1월, 2019의 게시물 표시

about mango.

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Mango is a fruit that grows in the tropics of the world.
Mango is also called the king of tropical fruits because many people in the tropics shake mango berries that are used as a staple. Mango is eaten as fresh fruit or used to make dessert jam, canned foods, and other foods. Mango is rich in vitamins A and C.
Mangoes are sometimes used as flour by grinding seeds.
Mango beans are usually beans or oval or round.
It is about 5 to 25 centimeters long and can weigh 60 to 2.5 kilograms.
The mango tree is an evergreen tree that grows to a height of about 20 meters.
If the leaves are thin and long, the flowers are small and pale red.
The fruit grows in the flower bed and ripens about five months after it blooms.
Mango was first cultivated in India and the Malay Islands 4,000 years ago.
In the 18th and 19th centuries, European explorers spread mangoes from India to other countries in the region of the fruit. Today, it is grown commercially in Brazil, India, Mexico, the Philippines and the U…

What is malaria?

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Malaria is a parasite disease that occurs mainly in tropical and subtropical regions.
Malaria sufferers suffer from misdiagnosis and high fever.
Two to three million people die of this disease every year.
A type of malaria fever is tropical fever, three-day fever, ovary fever.
The fever of malaria is repeated every 48 hours.
Out of malaria, a fever of four days is repeated every 72 hours.
A fever occurs with headaches, muscle aches, and nausea. After ten strokes, I sweat and lose my body temperature. The worst malaria is tropical fever malaria.
This disease usually dies when untreated Other malaria isn't that bad and can heal itself without treatment. Some malaria recurs after a long time.
There are basically three stages of life for the malaria parasite.
The first step begins when a mosquito bites a person with malaria.
The malaria parasites enter the body of the mosquito, reproduce in the stomach, and then the young ones come out of the stomach and enter the mosquito's sali…

horse Everything You Didn't Know About Words

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It was a perfect animal for working or running horses.
In the past, horses were very useful as a means of transportation. But these days, it is used for horse racing. The horse breathed easily through its wide nostrils and developed an auditory sense. The teeth of a horse are strong, but it eats only grains and grass, not
Long muscular legs allow for heavy loads or fast running. The legs and teeth of a horse are important weapons. Horses' kicking can cause serious damage to humans and animals, and biting can lead to loss of weight and reveal bones.
Horses usually have a good memory and are apt to be trained to obey orders from their owners when they call in the wind. A well-trained horse obeys a light signal that is barely noticeable. Since the last ice age, three distinct kinds of horses have emerged, which are the ancestors of all the horses that exist today. The horse is covered in fur.
The dense winter fur grows every fall and falls in the following spring.
However, the hook …

What is Marijuana?

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be marijuana leaves

It is a drug that dries leaves or flowers from the Indian Ocean.
Usually, they roll or pipe like cigarettes, but sometimes they mix with food or sound water. Marijuana use is prohibited by law in many countries, including Korea.
But in some countries it is also used for treatment purposes.
When you smoke marijuana, you have short-term psychological and physical reactions.
These reactions usually last three to five hours after smoking marijuana.
A person who smokes marijuana feels as if his body is floating in the air and changes emotions and thoughts. This psychological change is caused by tetrahydro canabinol, one of the chemicals in marijuana. The marijuana, which is 5 to 8 times stronger than marijuana, is a dried part that contains a lot of thc.
The feeling of smoking marijuana varies from person to person.
It depends on the time and time of day. Most of the time, I experience dreamy and awkward conditions, but sometimes I fee…

store Neolithic food and form a community

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As the Neolithic Age began farming, it was necessary to store and store food for a long time.  This vessel was called pottery, and the pottery was the representative invention of the Neolithic people, greatly changing the lives of the Neolithic people.
By storing and storing food in earthenware for a long time, one can plan ahead life and prepare for possible danger.  There have been many different ways to cook food while using earthenware.  In the past, there was only a way to cook food directly on fire, but now there is a new recipe, such as boiling and boiling it in a bowl.
We can eat hot soup in earthenware. The earthenware increased the diet of Neolithic people. The earthenware made by the Neolithic people, however, had a wide upper part and a soft base. Why did the Neolithic people make pottery shaped like this?
The Neolithic people seem to have stored and used the dishes in a designated place.
So, I think it's because it's made to be easy to put flowers on the ground.
A…

the New Stone Age Consciousness

Neolithic people planted pine and conch in the field. The rice was planted much later.
The harvested grain was first peeled off, then put it on a grating board and ground it into a ground stone. After that, I put water in a bowl and boiled it like porridge or steamed it with ssiru. The grain from the field was harvested by the necessity of a knife.
From the latter part of the Neolithic Age, a hand-sized half-moon shaped stone knife was used.  Unlike the Paleolithic Age, the end was finely ground.
Besides these, it was a must-have item for home use, such as grating, grinding ground holes, or holding heavy food used to make fire.
Neolithic people grew the most animals as livestock, such as dogs and boars.
The next was sheep and goats. Dogs and boars were able to grow and get meat and livestock.  And the horse could ride or carry luggage.

Neolithic people keep livestock at home.

Neolithic people stayed in one place for a long time and found that the same kind of plant grows in one place and bears the same fruit every year.
Until now, we had to look for each fruit or grass we needed.
But now we can get the seeds of the plants we need and plant them close by.
Neolithic people thought which plants would be good to grow.
Neolithic people were experts on plants because of their long collection.
The Neolithic people planted the first seedlings.  It was to set fire to the ground near the nest and remove the weeds to make the seeds grow well.
When the fire went out, I used my horn to pick out a root or stone under the soil.
Then I planted the seeds and waited for the fruit to come.
That's how the Neolithic people began to farm. Neolithic people have raised livestock at home ever since then.  The first animals to raise were dogs and boars.
It happened that dogs and pigs came to the place where people lived and ate bones and crops that people had left behind near t…

About Legionella disease

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an infectious disease that causes symptoms of fever, chest pain, breathing, and pneumonia. It occurs all over the world and usually occurs to people who suffer from pesky disease or who have undergone organ transplantation due to smoking.
Regionella's disease was first confirmed in July 1973 when 221 people who attended a meeting of the American Veterans Association held at a hotel in Philadelphia got the epidemic of phenom.  Thirty-four of the people with pneumonia died at the time, and the cause of the disease was not known at the time, so it was called re-army.
Then, in January 1977, a bacteria that caused this feline was discovered and named Reggiolla.  Legionella bacterium is characterized by invading the white blood cells, which are cells that fight against infection, and growing in them.
Regionella bacteria are found mostly in the water and are found in the cooling towers and air conditioners of the hotel, hospital, and home of the disease.
Regionella's disease is diag…

What is lentils?

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It is a variety of lentils from various countries.

Lens beans were an ancient source of food. It is a plant that is widely eaten now.
It is located in Egypt, South Europe, the United States, and Western Asia.
The long pod is similar to the pod of peas and can eat the seeds.
The seeds of the lentils are reddish brown, gray, black, etc. and have a diameter of not more than 13mm.  The seeds of the lentils resemble lenses that go into the microscope camera telescope, etc.  Actually, the lens is named lens because it looks similar to the seed of lentils.  The seeds of lentils have a unique fragrance and are also very nutritious among the seeds of many beans and plants. It is especially rich in protein and carbohydrates and is usually used to make curroll salad soup.
Many countries, including India and the Middle East, enjoy eating lentils very much.
Lens grow well in sunny, dry soil, but if the ground is too fertile, they do not have much fruit. In some areas, …

Why are you sweating?

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Most mammals, including those who synthesize sweat from the tissues under the skin, have sweat glands that release water and some waste.
The animal with the most advanced sweat glands is human, with the exception of several skin types, including fingernails, toenails, lips, and ears of penises.
It is known that there are between 3 and 4 million sweat glands, although there are some differences among people. The sweat glands are dried in the dermis of the skin, and capillaries surround them. The sweat glands filter the water and waste in these capillaries. Sweat glands are divided into two types depending on the type of sweat secreting. The other one is the Apocalypse, which is located near a gutter or anus.
In the apocrine glands, part of the cell of the secretion cells falls off and is mixed in sweat to cause body odor.  You can see some people smell bad.
This is what happens with the development of the apocrine glands.
More than 99 percent of the sweat is water, and a small amount …

What is the lymphatic system?

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The lymphatic system, like a blood vessel, is spread throughout the body, but its ends are not connected to each other and are spread to tissues.
The lymphatic fluid is very similar chemically to plasma. But the amount of protein is about half the plasma.  Large protein molecules cannot easily pass through vascular walls like any other substance.  There are lymph nodes all over the lymphatic tube. Lymph node that looks like a bump is about 1 to 25mm in diameter.
It is gathered around the neck and armpit groin and various organs and thick blood vessels  Lymph node has macrophages that absorb harmful substances or dead tissue.
It is a type of white blood cells produced by lymph nodes that combine with external invaders such as microorganisms and antigens to protect the body.
When abnormal cells or substances that break in from outside reach lymph nodes, the lymphocytes in the lymph nodes make antibodies. Antibodies destroy abnormal or heterogeneous substances or turn them into harmless…

About the lymphatic system

The lymphatic system is a system of small tubes similar to blood vessels.
The lymphatic system is responsible for sending back water, protein, and inorganic salt that seeps out of capill A liquid that soaks out of the blood vessel, soaks down body tissue, and provides nourishment, is called a tissue fluid
If the tissue does not return to the blood, the body tissues will swell.
The tissue mostly seeps back into the capillaries and partly into the lymph system.
The fluid in this lymphatic system is called a lymphatic system.
The lymph system is connected to the vein and circulates around the body again, so it also protects the lymph system with salt. Lymph node is a small lump of tissue all over the lymphatic tube. Lymph node filters out harmful particles and germs that enter the body.

What is rheumatism?

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A term that typically leads to a number of diseases where muscles or joints become stiff or pain occurs in the area. Doctors usually use more specific names of body diseases such as arthritis, mucus, muscle pain, and tendonitis instead. Arthritis is a disease in which joints ache, stiffen, and swells. The most common arthritis is osteoarthritis and mothic arthritis, both of which can cause severe disabilities. Mucusitis is an inflammation of the mucus glands which contain a liquid that smooths the surface between the bone and the muscle or tendon. Muscle pain is also called muscular dystrophy and can occur if you overuse your muscles or have viral infections such as cold influenza. Tendonitis muscles to bone and put it on the tendon that aches and swelling.

What is rheumatoid fever?

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a disease of the joints, heart and body heat  be a feverish disease
Children between the ages of 5 and 15 usually get sick, but children under the age of 5 and adults can also. The name rheumatoid fever is because the most common symptoms of this disease are rheumatism and fever that causes inflammation in the joints. The rheumatoid fever lasts for several weeks and months.
This disease can damage your heart permanently. It is the most important cause of heart disease among children and young adults. Rheumatoid fever is not contagious.
Rheumatoid fever causes streptococcus. The process of the occurrence has not yet been clarified. It is assumed that the disease is caused by a series of fungi that causes the immune system to attack its own tissues. Symptoms are usually first seen about one to four weeks after a streptococcus infection Common symptoms are joint pain, swelling and fever, such as elbows, wrists, knees, ankles. Also, there are many cases of rheumatism in the heart Severe …

a fact that you might not have known about lemons.

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In many parts of the world, lemon flavored food and vitamin C are plentiful and contain vitamin B complex. The insides of lemons resemble those of tangerines.
Lemon is about 7.5cm long and about 5cm in diameter.
Lemon has many small springs with a yellowish skin that is thick, tough, and fragrant.
Although it is rare to eat lemons raw because of their sour taste, the juice and oil of lemons are used in a variety of foods. For example, it is used in lemonade and some soft sound. In addition to various fish and meat dishes, sweetened kiwi and biscuit salad taste with lemon juice and lemon oil. Also, lemon oil is used to flavor products other than food products such as detergent, soap, shampoo, perfume, cosmetics.
Lemon grows to 6.5 to 7.5 meters. Plants are covered with thorns and leaves with long, milky ends are pale green. Lemon has big, aromatic white flowers all year long except winter. The fruit that develops in the flower bed ripens about seven to eight months after the flower bl…

What on earthly is Lyme disease?

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It is a bacterial infection carried by ticks. The place where the disease was found was named after a city in Connecticut, U.S. Lime disease causes bacteria called Borelia burgdor waste that infects mites living in forests, bushes, and grasslands.
Mites are usually attached to animals, especially deer and small rodents, and if a person is bitten by an infected mite, they get Lyme disease.
Lime disease is most popular when the weather is warm.
Symptoms of Lyme disease vary in form and degree, so it is difficult to diagnose.
The first symptoms are the rash spreading from the tick bite, which usually occurs 2 to 14 days after being bitten by the tick But more than 25 percent of the infected don't have a rash. Other symptoms include fever, headache, blood pressure, muscle pain and joint pain Antibiotics are effective in the treatment of Lyme disease, and when diagnosed early in the year, most are completely cured. However, it is not completely cured and can cause dysfunction in the h…

An interesting story you didn't know about poop.

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It is called feces or feces which are excreted through the anus from the bowel to the outside of the body. It is normal for a person to poop three times a week, three times a day. For adults, one hundred to 180 grams of poop a day.
Poop contains 75 percent water and about 25 percent solids. About 1.5 liters of food that are digested every day go from small intestine to large intestine.
Most of the water and electrolytes contained in it are absorbed by the large chamber and only about 100ml of water is excreted as feces. About 30 percent of dung's solids are dead bacteria. Ten to twenty percent are fatty. Ten to twenty percent are inorganic matters such as calcium and iron. Two to three percent is protein.
Thirty percent are cellulose, which are substances that cannot be digested, and cell gall bladder pigment that has been removed from the intestine.
More than 75 different types of bacteria, including E. coli, have been found in the poop
 poop. is generally brown. .But the color …

What on earthly is leprosy?

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It is caused by an infection caused by a bar-shaped fungus called Hansen's bacteria.
Norwegian doctor Hansen first discovered the fungus in the tissues of leprosy patients in 1873. 
                                This is Hansen who first discovered the fungus.

The following year, it was announced that the bacteria caused leprosy.
The bacteria are usually infected with humans, but they are also found in chimpanzees and manga monkeys. It is not known exactly how leprosy is transmitted.
But there is evidence of germs breathing in or being infected.
There is no chance of leprosy being inherited or predispositioned.
Generally, people are not infected when exposed to leprosy. After being exposed to leprosy, you will become immune.  Leprosy takes only a small number of people with weak immune systems, and symptoms of leprosy appear in particular three to five years after the infection. The main symptoms are white or red spots on the skin and the area becomes numb. Also, the skin becomes…

the diet of Neolithic people

Neolithic people could catch shellfish whenever they went to the beach.
At that time, the sea level rose after the end of the ice age, when there were a lot of sea creatures.  Of all the shellfish, the Neolithic people ate oysters every day, supplementing vitamins and calcium.  The skull of a Neolithic man was discovered in a shell mound in Tongyeong, South Gyeongsang Province. Upon examination of this bone, the only deaf only found in divers was suffering from a disease called osteoma.
The Neolithic people ate not only shellfish on the shore but also shellfish and abalones from the deep sea.  For Neolithic people, acorns were an important supplement to carbohydrates. But how did the Neolithic people eat acorns that tasted like eight?
Once the acorns are ground and soaked in water, and water is changed a few times, the taste of eight quickly disappears.  Eight of us ate acorns without taste, but we could eat them just by pouring water and cooking them in a fire.

THE CHANGING WORLD OF THE NEOLITHIC AGE part 2

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To the Neolithic people, the sea was like a food warehouse.
Besides shellfish, large and small fish attracted Neolithic people.
The Neolithic people decided to go fishing. But there was a reason for catching fast fish.
We needed more sophisticated and sharp tools. In the meantime, I made a tool by simply breaking a stone, but now Now the stones have been Galvan in a rough patch.

This is a Galvan
Then the end became sharper and the surface became much smoother. This distinguishes it from the stone tools and is called the polished stone tools. Neolithic people made tools for catching fish that way. The tip of the window was sharpened to create a much more powerful window. The arrowheads attached to the tip of an arrow were also sharpened on a Galvan I also made a new tool called fishing If we tied the bait to a hook that combines stones and bones and let it drop under the sea, we could catch even the fish we didn't see. There was only one tool at a time, but there was also a tool to…

I'll tell you more about peanuts.

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a plant in the form of a cortury that ripens under the ground.
The origin of peanuts is known as Brazil, South America.
I came to Korea from 1800 to 1845. Peanuts are an important crop, especially in hot climates. Africa and Asia have grown about 85 percent of the world's production, and the major growers are India, China, and the United States.
Peanuts, which are plants that live in a year, can grow to be between 90 and 120 centimeters wide. Peanuts are yellow and shaped like butterflies. float on a leaf
Flowers continue to bloom for two to three months. It withers around noon at the turn of the sun. A few days after that, a sash shaped like a bag grows.
The ovary bag grows downward and pushes it into the soil, which is about 2.5 to 8 centimeters deep. The fully grown ovary is about 18cm long and contains a developing fruit at the end. This end is broken up and cooked with a peanut couture.
Peanuts are highly nutritious. Usually, they are roasted and eaten just for a while, or t…

the fact that I didn't know about strawberries.

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a small plant of roses growing to get delicious heart-shaped fruits
Strawberries grow almost on the ground, and flowers smell white.
The fruit first turns green and white and then turns bright red as it ripens.
Strawberries are rich in vitamin C. A botanist does not classify strawberries and fruits as real fruit. Real fruits such as persimmons and grapes have poetry in their pulp tissues, but strawberries do not.  It is covered with a seed of yellow, which does not taste very meaty, and each of which we call Mr. Jwae-hee is a fruit.
Fruit pulp is not the ovary, but the bottom of the flower. Strawberries have a short root and stem. The leaf that comes directly from the root is a layer of three leaves.
Strawberries grow in the wild or are grown commercially in almost every country.
So far, hundreds of different varieties have been developed that are suitable for various cultivation conditions. Strawberries grow best in cool, wet climates.
be well adapted to various soil  The plant bree…

the life history of beetles

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Beetles go through three stages of larvae pupae throughout their lifetime.
Every time you move from one stage to the next, the shape and structure change greatly, and this process is called a mutation Females lay oval-brown eggs.
The number of eggs that are laid at one time varies from several to thousands depending on the species. Most lay eggs on the food they eat, in stone crevices, or in holes in trees. Eggs that lay in spring or summer hatch a week or a month later.
Some species lay eggs in the fall and hatch next spring.
The beetle's larvae look completely different from the beetle's, and they have a different kind of food. Most caterpillars look like earthworms, but some look like small lizards.
Most larvae last from weeks to months. As the larvae grow, their outer bones become tight. Then, a new exoskeleton that is larger than the original build up of the body and comes out with the exoskeleton. This process is called a deviation.
Beetles deviate three to seven times …

What is diphtheria?

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It is an infectious disease caused by mucous membrane of the respiratory tract or skin.
At the end of the 19th century, diphtheria swept Western Europe and the United States, and most of the victims were children under the age of 10.
Today, however, children and adults are subject to diphtheria at a similar rate, and the prevalence of vaccines has been significantly reduced as a result of widespread access.
Diphtheria infection mainly affects the mucous membrane of the back hole of the phytip and pharynx mouth and throat to produce toxins. This toxin spreads through the body through the blood. Diphtheria spreads when a person with an infection coughs or sneezes. Also, there are no symptoms, but with germs, even the bacilli can spread the disease.  After two to five days of infection with diphtheria
In the beginning, the lymph nodes in the neck swell up with fever, inflammation of the throat. The thick gray membrane is formed on the flanks of the pharynx and extends up to the nose and…

What is a headache?

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There are primary and secondary headaches on the head. First, let's find out about
primary headaches. Primary headaches are the most common form of pain, tension headaches. I once thought that the head and neck muscles were tense because of tension. However, many studies have not found the reason for muscle strain.
However, many patients feel tense muscles such as the head and neck. There may be differences, but patients with tension headaches usually feel a constant and dull pain in the back of their necks and back of their heads. The treatment of tension headaches depends on how often you experience pain, using rest, painkillers, muscle relaxants, etc. People with frequent tension headaches should not take painkillers. Frequent use of painkillers can change the way the brain interprets pain signals and, when the pain drug is not effective, can cause repetitive pain So you can continue to rely on painkillers. In general, anti-depressants are treated for frequent or chronic heada…

the life history of toads

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Toads usually lay their eggs in the water, and when the eggs hatch and become adults,
they live on land. All toads return to the water for breeding.
Temporary puddles that occur after the rain in the spring or summer make good breeding grounds. During the breeding season, males attract females by making sounds.
All species lay eggs, and some species lay more than three million eggs at a time.
Because females lay their eggs in the water, the males adhere to the female's mumm and fertilize the eggs with semen. The eggs of toads look like small black dots and are protected by transparent jelly, which looks like long, thick thread.
After a few days, the eggs hatch and become small tadpoles. Tadpoles live in the water until they enter a pervert  Tadpoles become impolite through abnormalities.
A toad anomaly usually lasts three to eight weeks. Then the young toad leaves the water and lives on the ground and grows rapidly, making several species an adult.
Toads work mostly at night or o…

the changing world of the Neolithic Age part 1

By about 10,000 years ago, the last ice age was over, and the Earth's climate was almost like it is now.  The climate of the Korean Peninsula has changed, so has the natural environment.  The forests have changed into trees and grasses that live in warm areas, and the animals that live in forests and rivers have changed.
Instead of the large animals in the Paleolithic Age, there were more small animals and more fish and shellfish.  As the environment changed, people's lives gradually changed.
From this time on, we call it the Neolithic Age.  Neolithic people lived on the Korean Peninsula from around 8,000 B.C.  Neolithic people saw trees and fruits that had not been seen in the forest.  I also saw small animals such as deer, wild pigs, wolves, raccoon dogs and badgers. Among them, it was the acorn-night fruit that caught the eyes of the Neolithic people.  Neolithic people believed that long-lasting acorns were used for food to prepare for the cold winter. So I diligently colle…

History of zoos

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The zoo is where you can see them.

Zoos were first made in Egypt around 1500 B.C.
About 500 years later, King Mun of China built a huge zoo that was 6,070,000 meters wide.  From 1000 B.C. to 4000 B.C., rulers in northern Africa, India, and China built many small zoos to show off their rulers' wealth and power.
The ancient Greeks founded a public zoo to study the lives of animals and plants.
The Romans had many private zoos and collected many wild animals publicly for use in the blood vessels in the Colosseum.  The monarchs and nobles of the Middle Ages liked to collect animals.  Modern zoos were developed in the Royal Zoo and on-the-go wild animal shows.  At the end of the 15th century, interest in zoos grew as interest in earth exploration and knowledge grew in the West.
The explorers of the time brought strange animals from the New World.
Over the next 250 years or so, many zoology was built in Europe.
But some of these things had little to see, …

about the circulatory organs of animals

Large-sized animals with many cells need organs to transmit digestible nutrients and metabolite products from one cell to another or to export them out of the body. The circulatory agency is doing this. The circulatory system has blood vessels, a heart, etc. The circulatory system varies greatly from animal to animal. There is a closed circulatory system in which the blood circulates only within the circulatory system and the blood vessels are not connected from beginning to end, so there is an open blood relationship where the blood flows between tissue cells and returns to the heart. Blood consists of red blood cells, white blood platelets, etc., which carry oxygen and carbon dioxide, remove foreign substances from the body, and do things like clotting.  There are veins in the blood vessels and thin capillaries that are net-like throughout the body.  Capillary vessels are where nutrients are transferred from blood to tissue and gas exchange occurs between them.  The heart contracts and…

On the Respiratory System of Animals

The body of an animal produces waste that is unnecessary or harmful as a result of the metabolic action.  Animals breathe in fresh oxygen through their breath and send out carbon dioxide and water instead.  Animals do not have the ability to write with oxygen stored in their bodies indefinitely, so they must continue to take oxygen from the air and release carbon dioxide after metabolism.
Respiratory system is the organ of the body that exchanges these gases.
Vapors such as malamines and hydra have no special structure for breathing and they exchange gas by diffusion on the surface of the body.  These breathing exercises are called direct breathing On the other hand, as other animals become bigger and more diverse, the structure for breathing resulted in gills, lungs, etc.
Breathing through these organs is called indirect respiration. 
Gas exchange between the outside of the body and the fluid is called external breathing.
With the help of the circulatory system, gas exchange occurs i…

facts about how animals are fed

Each animal has its own special body structure to live in harmony with its surroundings.
This is called adaptation. Fish in the water breathe through their fins to adapt themselves to the underwater environment. Just as fish cannot survive out of the water, rabbits living on the ground will die soon if they enter the sea.
Rabbits have developed hind legs so that they can swim well in the mountains, and even in the cold, they also suck the nutrients directly from the blood and intestines.
Meat-eating animals such as lions and tigers can also eat entire living things.
Parasites sucking in sheep need no complex mechanism to obtain nutrients.
But carnivores and herbivores need complex mechanisms to digest food, get the nutrients and energy they need, and turn it into a component of their body.
So, a device that feeds and digests food is called a digestive system.
Animals eat with their mouths. The way they put their food into their mouths depends on the species.  The animals use the tenta…

What is arteriosclerosis?

A disease in which the walls of the arteries become stiff, thick, and elastic.
Arthrosclerosis is a carotid arteriosclerosis, which is most common
Stomach arteriosclerosis is good looking for medium-sized arteries and arteries that carry blood, especially aorta, brain, kidney, leg, etc.
Arterial sclerosis occurs mostly in the middle age or older, but can also occur in younger age groups.  Juksang Dong-Mexico is said to be one of the major health-threatening diseases in many developed countries.  Stomach arteriosclerosis is caused by the buildup of fat in the blood, especially cholesterol, on the inside walls of the arteries.
The arteries become stiff and narrow, and eventually the blood flow decreases.
And blood clotting on the walls of the arteries. This blood clot can clog the arteries in no time. High blood pressure, smoking or high cholesterol levels in the blood are most likely to cause atherosclerosis  Obesity, lack of exercise, diabetes and diabetes are also dangerous factors. …

the fire that I first met in the Paleolithic Age.

The acrid smell was snoring and the sky was filled with black smoke.
The flames surrounding the forest and the fields seemed unlikely to stop easily.
People in the Paleolithic Age first saw a forest fire.
I was so surprised that I was busy avoiding where it was safe.
Fortunately, after a while, the fire subsided and people went to the blackened forest.
There was still a small fire left in the forest. The burnt trees and animals were confused.
One of the crowd said the place where the fire was left was warm.
Another said the burnt animal meat was very soft. That's how the Paleolithic people got a fire. That's how the Paleolithic people got a fire. People in the Paleolithic Age have become easier to withstand the colder weather than before after they had a fire.
We also learned that wild animals would not be able to come near if we set fire to them.  It was difficult to escape from the threat of the beasts just by going around in groups.  Now there is a new weapon called fire.  …

new knowledge of pyrogenic bacteria

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I'm so while I was a study while I was my friends while I was my family was my backgroc
A pylori is closely related to the body of another living organism, and after growing rice, the leaves are spotted with dark brown spots and the whole leaf becomes brown, so the hot grass does not grow and does not hesitate to grow.
Sickness occurs anywhere in the world where rice is grown and occurs through the generation of rice throughout the world. In Korea and Southeast Asia, where rice is grown through rice transplantation, it begins with a bospan and continues to the twilight.  Depending on the location of the plant and the period of reproduction, the bottle is called a bottle of peregrine, a bottle of leaf, a bottle of mallet, and a star of ear tree  In Korea, as the growing area of rice plants in the Unified Korean Peninsula, which led to the green revolution in the early 1970s, a heat wave broke out nationwide in 1978 and caused serious damage to the government to compensate 35 billio…

What is an artery?

a blood vessel which supplies the blood from the heart to each part of the body.
The blood flowing through most arteries is bright red because it combines with oxygen while passing through the lungs. But blood flowing through the pulmonary artery from the right ventricle of the heart to the lungs is brown because it is not bound to oxygen yet.  When the artery breaks, blood spills out against the heartbeat.
Therefore, if you look at the color and flow of blood when you break a thick blood vessel due to an accident, you can tell whether the blood vessels are arteries or veins.
The walls of the arteries are three stories high.
The barricade is made up of elastic tissue and the middle layer is the muscle layer.
The innermost layer is made up of thin, soft cells of the same kind that make up the inner walls of other vessels and the heart.  Each time the heart beats, the elastic wall swells up to make room for the blood to flow in.
Then the muscle tissue in the blood vessels slowly contrac…

the wise Paleolithic people who make tools. part 2

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Paleolithic people thought of how to make better tools. So the tool that was created was a fist axe.  The fist axe was a very delicate tool.
One side was trimmed gently to make it easier to reach, the other side was carefully trimmed several times and shaped with a crisp, sharp shape.
So it was effective in cutting down and cutting large animals.
It is difficult to make a meal, but once made, it was a useful tool.
The person who made such elaborate tools was probably the best engineer in the crowd.  Stone tools made by Paleolithic people remained long because they did not decay or change. So where the Paleolithic people lived, the tools they used remained, even though they did not have the appearance of the Paleolithic people.
Tools allowed future generations to imagine what Paleolithic people looked like.
Traces of Paleolithic life were found in many places. 
Tools and animal bones used by Paleolithic people were found in Seokjang-ri, Gongju, South Chungcheong Province, in Jeongok-ri…

the wise Paleolithic people who make tools. part 1

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People in the Paleolithic Age were very talented. As I became free to use my hands, I used my hands to do various things. The best of them is to make the necessary tools for life. It needed tools to collect in the fields and forests, and tools to peel or cut the bark of the collected plants were also needed
I tried to catch fish by the river, but it was hard to catch with my bare hands.
Paleolithic people thought about what tools they would need and drew them in their heads.  And I actually started making tools. The materials needed to make the tools used bones of trees or animals that could be readily found around them.
But the stone was the best ingredient. Paleolithic people first carved out large stones and made them smaller. If the stone is rough or blunt, the end of the stone is broken and sharpened.  These stone tools are called stone tools.
The stone tools were a valuable asset to the people of the Paleolithic Age.
Stone tools were used in the lives of people in the Paleolithi…

the beginning of the Paleolithic Age

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The Paleolithic Age began when Homo erectus arrived on the Korean Peninsula.
The Paleolithic people who lived at this time were not strong enough to beat the beasts.
Nor was there a strong weapon that the beasts could defeat.
When I went out to the field by myself, I had no choice but to be tied up in meeting the beasts.  So the Paleolithic people lived in groups of at least 20 or 30 people.
The most important job for all these Paleolithic people was to get something to eat.
Paleolithic people went around the mountains and fields, picking fruit, or catching small fish by the river or by the sea for food. People in the Paleolithic Age were doing well in what plants they ate.  Some days, there were fish hunting small animals.
There were days when lucky, when the beast left behind the meat.
But food was not always in the same group.
So I had to move from place to place looking for food.
The best house for the Paleolithic people was a cave.
The cave was good to avoid the attacks of the b…

the truth of a lizard

Many lizards do not freeze on the ground because of their lack of thermoregulation compared to other animals. Lizards that live in cold climates must hibernate.
Lizards are the most common reptiles found in warm areas, such as tropical and temperate regions, and in deserts and dry areas.
When the desert gets too hot, the lizard goes into the shade or sand to avoid the sun.
The most remarkable feature about lizards is that they have a variety of ways of moving.
A giant lizard named Mosaus, who lived 60 million years ago, straddles the sea and moves around.  Many species today move through trees and trees like flying squirrels.
These lizards are called flying lizards. Many kinds of lizards live on land or trees.
A lizard defends itself in many ways.  Many lizards bluff and threaten or cheat their enemies like snakes do. When a lizard is attacked by an enemy, it disconnects its tail.
But some lizards hurt their enemies.  Some other species, similar to the royal lizard, have a large jaw a…

a reason why cigarettes are harmful to the body

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Can be synthesized as artificial in one of the few natural alkaloids that have a small amount of chemical in the root seeds of tobacco.
Cigarettes usually contain 1 to 2 percent nicotine, so each cigarette absorbs 0.05 to 2 milligrams of nicodin.  Nicodin is quickly absorbed into the blood and reaches the brain within 8 seconds of inhaling it. Pure nicotine is a very dangerous substance.
Nicotine can cause vomiting and extreme weakness in very small amounts.
Also, it makes your pulse fast but weak and you can die if your body is weak or severe.
Nicotine is a substance that makes people addicted to cigarettes.
Doctors usually claim that smoking is harmful.
If one consumes excessive amount of nicotine in a short period of time, one may die of muscle paralysis or respiratory problems due to acute nicotine addiction
Usually chronic nicotine addiction caused by long-term smoking, but light headaches, vomiting, cold sweat, etc. When addiction worsens, symptoms such as impaired vision, convu…

Wolves hunt

Wolves eat anything they can catch. Animals such as reindeer and other animals that wolves hunt are faster and stronger than wolves, so wolves should be smarter because they must be faster and not be tired easily. Wolves hunt day and night.
When groups gather together to hunt, they greet each other with a howl.
The sound is so loud that it travels around the neighborhood until it finds another group.  When they find a prey, they approach it in the wind so that they don't smell the wolf. Sometimes, they approach the food quietly and then surprise it.
Wolves chase more animals than they can actually catch.
When hunting for food, attack the hips or sides, cause them to bleed, make them weak, and then pull them out of the neck or mouth.
It takes only a few minutes for a wolf to kill a large animal, but the whole hunting time takes several hours.  On the other hand, if the prey is very strong or too fast, they stop hunting and give up.  Old animals that are sick and injured behind the …

wolf life

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Most wolves live in groups. There are usually about eight or more people in a group.
There are some cases where there are more than 20 of them.
An zoologist sees wolves as having a strong bond and staying together.
Some wolves live alone, leaving the pack.
When you meet a mate, you give birth to a rabbit and form a new flock.
Wolves found in our country do not swarm.
There is a hierarchy within the pack of wolves, so every wolf has a certain class.
The wolf with the highest rank checks its status each time it encounters.
The controlling wolf straightens its body, lifts its tail high, holds its ears up and up, shows its teeth, and growls. On the other hand, the dependent wolf curls its ears down with its tail tucked between its legs.
Wolves live in a certain area called the "sitchen rights," and the range of the ticket varies mainly depending on the amount of food they eat.
Wolves smell and mark the right to live in the neighborhood, and the leader urinates in rock trees alon…