11월, 2019의 게시물 표시

on the history of doctors

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Surgery has been known since ancient times. The first tool used by surgeons is known as flint carving. Stone Age through the operation, which lasted through the hole in the patient's skull in the Stone Age people tried to drive Spirit is believed to have cause headaches and other diseases.  In primitive times, broken legs were splintered to keep them from moving. I used a method of laryngeal support to stop bleeding. The ancient Babylonians, Greeks and Romans knew about surgery. The Department of Ophthalmology in the army has been an important position in surgery since 2000-3000 years ago  The Hindus of ancient India knew more than 125 surgical instruments as outstanding surgeons. I've also developed a plastic surgery technique to replace a severed nose and ears. In the Middle Ages, surgeons and barbers performed surgery. But the only way to draw blood from a patient was a barber. Because surgeons thought doing such things would damage their dignity. The red and white stripes…

a fact that I didn't know about meningitis in the brain.

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disease of the meninges that surround the brain and spinal cord.
Also called meningitis. 
It also occurs in cerebrospinal fluid, a fluid that surrounds the brain and spinal cord.
Watermelonitis occurs when the meninges are infected with bacterial virus fungi or other microorganisms.
There are two main types of meningitis: bacterial meningitis and viral meningitis.
Water meningitis can occur in any age group. 
Infants and children are the most affected.
Even if you have meningitis, you can recover completely.
But bacterial meningitis causes severe brain damage.   You can die if you are serious.
It can also cause deafness, paralysis, mental retardation, blindness, etc.
The risk of meningitis is very high when the resistance to infection, such as a deficiency in sickle cell anemia, a deficiency in immune globularia, and so on, is significantly reduced.   In the respiratory tract, germs and viruses that cause meningitis are parasitic.
The bacteria nor virus, infecting water screen to go …

facts about otters

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The head is small and flat, the neck is long and thick, the tail is thick, and the hair grows thinner at the end.
Also, with special muscles, close your ears and nostrils to prevent water from entering.
There are flexible webbed feet between the toes, so you can swim fast.
Otters, like beavers and mice, have long, rough barlike protective hair that is covered by short, dense inner hairs.
The otters have the air is sokteol the skin always remains dry.
Some species have a layer of fat under their skin to block the cold.
otters' hair ranges from brownish gray to dark brown.
Otters play with their feet on objects such as stones and small shells.
Also, some species that live in Africa and Asia do not see much development in their toes.   You can use your toes like your fingers.
Sea otters are living in the water in water eat seashells.
A otter has all the claws of a species.  Even a species called a minbaltop otter has short claws on its hind feet, three toes in the middle.
Sea otters…

about hand

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A person's hand consists of a wristbone, a handbone, and a finger bone.
There are 27 bones in the hand.  The wrist consists of eight bones.
The five long palm bones that make up the palm connect the wrist with the finger.
The thumb is made up of two finger bones.
The other four fingers are made up of three thin finger bones.
Thirty-five strong muscles move their hands.  Of these, 15 muscles are in the lower arm.
This is because these muscles are well arranged.
These muscles stretch close to the wrist, extending along the fingers and back of the hand to the knuckles.  When the muscles in the bottom of the lower arm retract, the fingers gather and the muscles in the back of the lower arm retract, the fingers spread.
The 20 muscles in the hand are arranged for many precise exercises.
The function and structure of the front feet vary from animal to animal.
A mole's short, thick forefoot is used to sell oysters.
The bat's front feet are wings with thin skin spread between its …

about the digestive system

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The fire started in your mouth.  Chewing is very important in digestion.
Chewed food is broken into small particles, making it easier to react to digestive juices.
Also, saliva and rot in the process of chewing food contains amylase.
The amylase in saliva breaks down starch in food water into sugar.
The food that is chewed and swallowed by the mouth is sent up past the throat and esophagus.  On strong muscles in the stomach lining is constantly shrinking food, relaxation of digestive juices and mix well.
The digestive juices secreted by the stomach are called gastric juices.
The gastric juice contains hydrochloric acid and pepsin, which digest protein foods such as meat, eggs, and milk, and does not digest carbohydrate fat.
Some foods usually stay in the stomach for two to five hours after meals.
But liquids and small pieces travel almost immediately to the small intestine.
A thick liquid formed when stomach food is mixed with digestive juices and partially digested is called yumi ju…

Become a nation and a people

It was not easy for people who had been enemies for a long time to come together in a country.  However, as the people of Goguryeo and Baekje joined forces with the Silla people to drive out the Tang army, the people gathered together little by little.
In addition, the state created a new or changed the Etudeo to govern the broadened territories and the increased number of people.  Soon after Goguryeo collapsed, the people of Goguryeo surrendered to Silla, leading a large group of people.
King Munmu made them live in Iksan, North Jeolla Province.
He wanted to get even a little help to dislodge the Tang army.
The remaining nomads lived here and there in the southern part of the country.
Silla was granted the right to serve as a government official of Silla or a government official of Goguryeo and Baekje.  In particular, they gave good treatment to those who surrendered to Silla and cooperated in fighting the Tang Dynasty.
The officials of Baekje and Goguryeo were given government posts…

About infantile paralysis

a paralytic disease caused by virus infection.
The reason why it is called polio is that children get sick a lot.
In the past, polio cases were common and left many patients with a lifetime of paralysis.
But since the polio vaccine was developed in the 1950s, it has almost disappeared in the developed world.
polio breaks into nerve cells in the brain and spine and causes paralysis.
But not everyone infected with polio always suffers from a serious illness.
Depending on the patient, only relatively mild symptoms such as fever, headache, and
These symptoms disappear in 24 hours.
These symptoms are common in many diseases.
Severe polio begins with the same symptoms as minor polio.
But the symptoms don't go away, the neck and back become stiff, muscular, and difficult to move.  It can cause pain in the back and legs.
It gets worse when you try to pull on that part or straighten it out.
Even if you have a certain level of polio, it doesn't always mean you're permanently paralyz…

The truth you didn't know about pine trees.

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Plants in the pine tree appeared on Earth at the end of the Mesozoic Triassic Period, about 170 million years ago. 
The current living plant in the pine tree appeared in the third period.
Pine trees have grown gradually in Korea since about 6,000 years ago.
This plant, which had been decreasing since, was destroyed by the development of agricultural culture.  Forests were destroyed and then re-spread.
The period when Korea began to protect pine trees was during the Silla Period.
During the late Goryeo Period, Ondol became common.
During the Joseon Dynasty, many pine trees were needed to build new palaces and ships, so the country banned pine tree hives
As a result, in the 1930s, more than 70% of the country's forest area became pine trees.
Collect firewood and pitch in the Japanese occupation, destroyed much of a lot.
In the 1960s, truffles were severely damaged.
First reported in 1929, pine needles have been damaging pine forests nationwide so far
Also, the pine tree re-election…

a germ life of bacteria

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Germs live almost everywhere and can live in places where no other life can.
Many bacteria live in air and water and soil.
There are always bacteria in the skin digestive system of humans and other animals.
Curiosity germs need oxygen to live.  Anaerobic germs can live without oxygen.
Some kinds cannot live with even a little oxygen.  Germs are in nutrients, oxygen or water A lack of heavy new cell membranes in the cell membrane to keep the body.
Newly made sandpaper around the membrane is dead and remaining bacteria are not working.  Germs can survive for more than decades because they can withstand very high or low temperatures. 
If nutrients, oxygen, or water are available again, spores turn into active bacteria.
It travels far away by the flow of air and water.
Many items such as clothes and utensils carry germs, too.
Many species of bacteria can swim as a single mother, and bacteria without a single mother can wriggle.  Mostly dependent nutrition bacteria feed on other organisms…

How do I prevent harmful germs?

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There is always a lot of germs living in human skin and mouth-to-mouth airway.
But other tissues are free from germs if they are in a normal condition.
Prevent harmful germs from entering the skin, digestive and circulatory systems.
When most harmful germs break into the body, white blood cells surround and attack.
Blood produces scents that kill or make germs.
The toxin is neutralized by antibodies and becomes toxic.
Sometimes the body cannot produce toxins quickly.
In this case, toxins from animals or other people, such as horse rabbits, are injected
Vaccines made from dead or weakened germs can prevent diseases.
This vaccine makes antibodies in the body to fight diseases that are caused by the same kind of bacteria.  They make antibiotics in air, soil, and water, which can also kill or weaken pathogenic bacteria.
However, using too much antibiotics results in bacteria that are resistant to the drug.
People use preservatives to prevent germs from growing in living tissue.
Disinfect…

What are harmful germs?

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Some bacteria cause diseases in humans such as cholera, dysentery, pneumonia, syphilis, tuberculosis, typhoid, and white sun. 
Bacteria enter the body through natural holes, such as nose, mouth, or wound, or are transferred to humans through air, food, and water.
Harmful germs destroy healthy cells, making the body unable to function properly.
Some bacteria make toxins that cause diphtheria tetanus, etc.
Toxins are produced by living germs, but some are released after they die.
The food poisoning, called botulinum toxin, causes the germs in the decayed canister to form a gene.  Even bacteria that usually do not live in the body can cause disease when people lose their resistance to disease.
Anthrax is a bacterial disease that occurs in many animals, especially cattle and sheep.
Burn disease in apple trees and pear trees The rotting disease that causes some fruits and vegetables to decay is a bacterial disease
Also, many plants cause a disease that makes a lump called root cancer.


interesting facts about germs

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a simple organism belonging to a prokaryotic system consisting of a single cell.
Germs are one of the smallest germs, most of which are about 0.3 to 2 micrometers in diameter.  You can only see through a microscope.  Germs exist everywhere in humans, thousands of species, and most of them are harmless to humans.
Some germs live in the intestines of humans and animals and help digest food and destroy harmful creatures.  And they also make the vitamins that the body needs.
Bacteria that live in soil and water play an important role in the circulation of various chemical elements, including carbon, nitrogen and sulfur, which are necessary for living things.    Germs decompose the excrement of dead organisms and animals into chemical elements.
If not broken down by bacteria excrement or dead organism constitutes the chemical elements are preserved to all living things is no longer will not live.
Germs also convert chemical elements into forms that can be used by plants and animals.  For …

What is scarlet fever?

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It is an infectious disease caused mainly by the oral cavity in the bloodstream.
The scarlet fever originated from a rash of skin.  In the past, scarlet fever was considered a terrible disease, but since 1950 the incidence of scarlet fever has decreased a lot.
scarlet fever is associated with bacterial infection in the throat or skin.
Hemolytic streptococcus develops toxins that affect the surface throat of the skin's tongue, which causes scarlet fever.

The above picture is a typical symptom of scarlet fever.
When scarlet fever appears with sore throat, it is the same symptom as when the throat is infected, such as a sore throat, a headache, and a swollen lymph node in the neck.
A rash of scarlet fever occurs within two days of the outbreak.
It looks as if the color of red has come out.
This rash can spread all over the body except for the face.
The inflammation of the tongue deepens and becomes what the tongue calls a strawberry-shaped strawberry.  After a few days, your skin st…