Incredible facts

Nowadays any information about our body can be found on the Internet. But quite often we start looking for it when some kind of malfunction occurs in our body.

But there are also many things that are still unclear to scientists and specialists. And although some questions are best left to the professionals, it can sometimes be useful to learn something interesting about your own physiology.

1. Gastrointestinal fistula

This is a hole that forms in your stomach or intestines, causing its contents to leak out.

2. Blood

Almost every fluid in our body consists of blood to some extent. Your tears, breast milk, sweat - all this is blood.

3. Melanoma

Melanoma is a malignant skin tumor that can be small and barely noticeable. What's more, melanoma often looks like freckles to the average person, but it can be the deadliest of all cancers.

4. Gastric juice

If the cells in the stomach walls did not constantly repair themselves, you would digest yourself.

5. Acne mite

These are mites that live on your eyelashes and eat dead skin cells.

6. Concussion

A concussion occurs when you receive a blow to the chest in a specific location at a specific moment, causing your heart to stop. And yes, you can die from a blow to the chest.

7. Digestive tract

There is excrement in our digestive tract all the time, almost all the time.

8. Chronic alcoholism

Chronic alcoholics may develop esophageal varicose veins. So, during defecation, the mouth may begin to bleed after a few minutes.

9. Human microflora

It refers to the collection of microorganisms that live outside and inside you. It is believed that the number of microbes in body human cells exceed the number of cells by 10 times. During bowel movements, the scales tip in favor of human cells.

10. Telomerase

This is an enzyme that essentially makes your cells immortal, but they are essentially turned off after birth. Cancer cells reactivate these cells.

11. Prions

You may or may not have misfolded proteins in your brain called prions. But if there are prions, one day they may "convince" other proteins to fold the wrong way too, and you will die (after you go crazy).

12. Dangerous triangle on the face

Due to the special blood supply in the nose and surrounding area, an infection in the nasal cavity can spread to the brain. Squeezing blackheads on the nose or nasolabial area can be deadly.

13. Slime

On average, we secrete about 2 liters of mucus every day and swallow it.

14. Organisms

There are more bacteria and other organisms in your body than there are people on Earth.

15. Obstructive colorectal cancer

One possible symptom of this disease is vomiting feces.

16. Childbirth after death

This occurs when gases inside the body of a deceased pregnant mother accumulate and push the fetus out.

17. Cancer cells

Every hour of every day, our body produces cancer cells. They do not lead to cancer because our immune system destroys them.

18. Eyes

The eye is not perceived by our body as belonging to our body. In other words, if there weren't a barrier protecting our eyes from the immune system, our white blood cells would attack them. In scientific terms, our eyes have an immune privilege.

19. Lazarus reflex

This is a reflex in brain-dead patients that causes the person to raise their arms and fold them across their chests, like Egyptian mummies.

20. Aneurysm

An aneurysm, a bulging artery wall, can kill you unexpectedly within seconds, even if you are young and healthy.

21. Internal decapitation

This phenomenon, also known as orthopedic decapitation, occurs when the skull is separated from the spine, but everything else remains intact. In 70 percent of cases this leads to immediate death.

22. Smell

When we smell something, small particles of that object attach to the inside of our nose. This once again confirms your worst fears.

23. Meconium

Meconium - A baby's first bowel movement is the result of ingestion of hair, skin and other substances while it is in the womb.

24. Kidney transplant

The diseased kidney is not removed and therefore after transplantation a person has three kidneys.

25. Dermoid cyst

This formation often contains teeth, eyes, and other body parts.

The human body remains one of the most mysterious and complex creations on Earth; many amazing processes occur in it every second.

1. Human fingers are so sensitive that if they were the size of the Earth, you could feel the difference between a house and a car.

2. The human body contains 60,000 miles of blood vessels. This would be enough to wrap around the Earth twice.

3. The human eye is so sensitive that if the Earth were flat, you could notice a candle flickering in the night at a distance of 30 km.

4. When you blush, the lining of your stomach turns red too.

6. Inside your belly button, thousands of bacteria form an ecosystem the size of an entire rainforest.

7. During the period of love, the human brain produces the same cocktail of neurotransmitters and hormones that is obtained when taking amphetamines. This leads to increased heart rate, loss of appetite and sleep, and severe anxiety.

8. We could see ultraviolet radiation if this ability were not filtered by the lens of the eye. Some people who have had lens removal surgery see ultraviolet light.

9. An adult human being is made up of 7,000,000,000,000,000,000,000,000,000 (7 octillion) atoms. For comparison, there are “only” about three hundred billion stars in our galaxy.

10. Our muscles are actually much more powerful than they seem. This force is usually limited to prevent the person from damaging the muscles and tendons. Restrictions can be removed with the help of adrenaline - it is under its influence that people are able to lift boulders and even cars.

11. We are the best long-distance runners on the planet. Better than any four-legged animal. In fact, thousands of years ago we were able to herd our prey until it died of exhaustion.

12. In 30 minutes, the human body generates enough heat to boil 4 liters of water.

13. We have as much hair on our bodies as chimpanzees. Most of them are useless and so thin that they are practically invisible.

14. The atoms that make up your body today are the same atoms that were formed during the Big Bang 13.7 billion years ago.

15. Human bones are as strong as granite. A piece of bone the size of a matchbox can support up to 9 tons of weight.

16. If the human brain were a computer, it could perform 38 thousand trillion operations per second. The world's most powerful supercomputer, BlueGene, can only do 0.002% of that.

17. The focusing muscles in your eyes move 100,000 times a day. To train your leg muscles the same way, you would need to walk about 80 km every day.

18. For every kilogram of fat or muscle, your body creates 10 kilometers of new blood vessels.

19. Human DNA is 50% identical to banana DNA.

20. Loneliness can cause physical pain. So if you want to avoid the pain of loneliness, you have a powerful incentive to connect more actively with other people.

21. Every second your body produces 25 million new cells.

22. People are bioluminescent and glow in the dark. The light we generate is 1000 times weaker than our eyes can see.

23. During his life, a person “sheds” about 40 kilograms of skin, completely renewing his “shell” every month.

24. The connected neurons of our brain are like the structure of the Universe. In a sense, the brain is created in the image of the Universe.

25. About 90% of our cells make us not so human - we are mostly fungi and bacteria.

26. Along with the five traditional senses of hearing, seeing, touching, smelling and tasting, humans also have 15 “other” senses. These include balance, temperature, pain, time, and also internal sensations of suffocation, thirst and satiety.

27. You are a little richer than you think. Each of us has approximately 0.2 milligrams of gold inside us, most of which is dissolved in our blood. Unfortunately, you would need the blood of 40,000 people to make one eight gram coin.

28. Our brain uses 20% of the oxygen and calories consumed by the body, despite making up only 2% of an adult's body weight.

29. Some women see more colors than everyone else. Most people have 3 types of color receptors, but these women have 4 or even 5, allowing them to see a wider range of colors.

30. A condition called synesthesia can cause one sense to be felt through another. In other words, some people can taste sounds or hear colors.

31. The need to breathe is driven more by the buildup of carbon dioxide than by the need for oxygen. If there was another way to remove carbon dioxide from the blood, we could breathe about once a minute.

32. Crying relieves stress and allows people to reduce feelings of anger and sadness. He physically helps to cope with problems.

33. Our tears also have different structures depending on the reason that caused them. Under a microscope, tears of grief, tears of hope, and tears while chopping onions look different.

The human body is a complex and intricate system that has been studied by the best minds for several millennia. And this is an extremely interesting fact, because, despite this, our body is capable of surprising even doctors, not to mention people without deep anatomical knowledge.

Brain

Impulses from receptors to the brain arrive at an amazing speed of 275 kilometers per hour.

To function, our brain needs energy comparable to the energy of an ordinary light bulb.

The electronic equivalent of the human brain's memory capacity can reach thousands of terabytes.

About 20% of the air from the bloodstream goes to brain function.

The brain is more active at night when we sleep than during the day when we are awake.

The higher your intelligence, the more dreams you see.

Neurons and brain tissue are capable of regeneration throughout our lives.

Different types of neurons transmit information at different rates.

The brain is unable to feel pain; it lacks pain receptors.

Four-fifths of brain tissue is fluid.

Nails and hair

Women's hair is on average two times thinner than men's; in addition, the thickness and coarseness of hair depends on race.

The beard and mustache grow faster than all other hair.

The average hair can support the weight of a hundred gram chocolate bar.

Toenails grow 4 times slower than fingernails.

Every day a person loses from fifty to a hundred hairs.

Blondes have the most hair, but they are thinner.

The nail on the middle finger grows the fastest, probably because it is the longest finger.

There is a lot of hair on the human body, as much as our closest primate relatives, but not all of it is so clearly visible.

One hair can remain in place for an average of three to seven years.

Human hair decomposes so slowly that it is virtually indestructible.

Before baldness becomes noticeable to others, a person loses more than 50% of his hair.

Internal organs

The heartbeat generates enough pressure to force blood to flow over a distance of 9 meters.

The small intestine is the largest internal organ in the human body.

The surface area of ​​one human lung is approximately one-fifth of a football field.

Stomach acid can dissolve thin blades.

The total length of the human circulatory system is 96,500 kilometers. For comparison: the circumference of the Earth is only 40,000 kilometers.

The gastric mucosa is renewed every three to four days.

Women's heart rates are faster than men's.

Scientists have counted about 500 useful functions that the liver performs.

The diameter of the aorta is the same as the diameter of a garden hose.

The left lung is slightly smaller than the right due to the fact that the heart is located on the left side.

A person is able to survive without a huge part of his internal organs, such as the spleen, 75% of the liver, 80% of the intestines, stomach, kidney, lung and all the organs of the pelvic region. Of course, living without most of the internal organs is not easy, but it is possible.

The adrenal glands change their volume throughout a person’s life.

Basic body functions

The air flow during a sneeze moves at a speed of 160 kilometers per hour.

During a cough, the speed of air movement decreases to 95 km/h.

A full bladder is the size of a large grapefruit.

Almost 75% of feces consists of water.

Women blink twice as often as men.

Earwax is produced to keep the ears healthy.

There are about five hundred thousand sweat glands on the feet, which are capable of producing half a liter of sweat daily.

Over the course of a lifetime, a person secretes so much saliva that it can fill two Olympic swimming pools.

The average person experiences bouts of flatulence about 14 times a day.

Reproduction

The largest cell in the human body is the egg, and the smallest is the sperm.

Teeth begin to appear six months before the baby is born.

Fingerprints appear on the embryo at three months.

Pregnant women at the beginning of pregnancy have frequent dreams about frogs, house plants and worms.

Almost all babies are born with blue eyes.

On a comparative weight basis, a newborn baby is stronger than an ox.

One in two thousand babies is born with a tooth already grown.

Each of us spent half an hour of our existence in the form of a single-celled creature.

Most men experience erections several times a night.

Sense organs

After a heavy meal, hearing becomes worse.

About one third of humanity has perfect vision.

Unlike men, women have a more developed sense of smell.

If a product is not able to dissolve in saliva, we are not able to taste it.

A person can remember about 50 thousand different smells.

Even the slightest noise causes the pupils to dilate slightly.

Every person has their own scent that is completely unique; Only twins don't have it. Identical twins smell identical.

Old age and death

The ashes of a cremated body weigh on average 4 kilograms.

Nails and hair do not grow after death; they appear longer because the muscles and skin dry out.

By age 60, people lose about half of all their taste buds.

The size of the eyes does not change at all, but the nose and ears do not stop growing until death.

By the age of 60, more than half of men and slightly less than half of women begin to snore in their sleep.

A person remains conscious for 20 seconds after decapitation.

Disease

Most often, according to statistics, heart attacks occur on Monday.

A person can survive without food longer than without sleep.

An ordinary, mild sunburn can severely damage blood vessels.

Almost 90% of diseases can be either caused or complicated by stress.

Muscles and bones

To smile you need to use 17 muscles, and to frown - 43.

In the morning we are 1 cm higher than before going to bed, due to the fact that the vertical position contributes to pressure on the spine.

At birth, the number of bones is 300. Over time, some of them fuse, and in an adult there are fewer of them - 206.

The hardest bone is the jaw.

The strongest muscle in the human body is the tongue.

To take one step, a person must use 200 different muscles.

The tooth is the only part of the body that cannot heal itself.

It takes twice as long to lose newly acquired muscle mass as it does to gain muscle mass.

Bone is stronger than some steel alloys.

Of the 206 bones in the human body, 52 are in the feet.

Cells

About 16 million bacteria live on every square centimeter of skin.

The outer skin of a person is renewed every 27 days.

Every day the human body produces 300 billion cells.

About 300 million cells die every minute in our body.

We shed about half a million pieces of dead skin every hour.

The imprint of a person's tongue is as unique as fingerprints.

There is enough iron in the human body to fuse a nail 7 centimeters long.

The most common blood type is first. About half of the world's population has this type of blood.

The color of the lips is so bright because the capillaries in them are located directly under a thin layer of skin.

Miscellaneous

The size of a baby's head is 25% of the length of his entire body. The head size of an adult is only one-eighth of height.

The colder your bedroom, the more likely you are to have a nightmare.

Tears and mucus contain an enzyme that can destroy the membranes of many bacteria, thus protecting us from infection.

In half an hour, the human body produces enough energy to bring 4 liters of water to a boil.

Our ears produce more wax when we are scared.

It is impossible to tickle yourself.

Arm span usually matches height.

Humans are the only representatives of the animal kingdom capable of crying due to emotions.

According to statistics, right-handers live 9 years longer than left-handers.

Women burn calories slower than men.

Koalas and primates also have unique fingerprints.

The depression between the nose and upper lip is called the philtrum. Scientists have not yet determined what it is for us.

The human body holds many secrets.

1. 15% of people lack long palmar muscles.

The absence of this tendon does not affect grip strength in any way. But when the need for transplantation arises, it is a good source - a kind of spare part in the human body. In other mammals, this same tendon is responsible for releasing claws. Apparently, that’s why some people don’t have it - our species doesn’t have the need to extend claws.

To check if you have it, gather all five fingers into a pinch and bend your wrist - the tendon is clearly visible in the wrist area, provided that it is present.




2. Some people faint after urinating.

As a rule, this type of fainting occurs after emptying the bladder, due to a sharp decrease in blood pressure. This is the result of overstimulation of the nerve fibers that ensure a change in the tone of the bladder and, accordingly, the act of urination.

To date, the origin of this type of loss of consciousness has not been fully studied.


3. Your ovaries and testicles originated in the same place as your kidneys.

This is why if you kick someone in the balls, the opponent will also feel pain in their lower back. However, it is not necessary to check this yourself.


4. Your left kidney is higher than your right.

The left kidney is 2.5 cm higher than the right one, since the liver hangs over the right kidney. This is the physiological structure of the kidneys in humans. Both men and women.

Men's kidneys are larger in size than women's.

5. Without food, blood sugar levels can remain within normal limits for up to 2 - 3 days.

Normal blood sugar levels are equivalent to a teaspoon dissolved in the entire volume of blood, so it's actually a fairly small amount.

When blood sugar levels drop to a minimum, there is not enough glucose to supply the body's cells. This condition triggers the liver to convert stored glycogen into glucose until glycogen stores are completely depleted. You will smell the “smell of acetone” from your mouth.


6. An adult has fewer bones than a child.

At birth, there are more than 300 bones in our body, but as we grow older, some bones fuse together, eventually becoming 206.

7. Humans are the only mammals unable to breathe and swallow at the same time.

For animals, combining breathing and swallowing is not a problem. Children under 9 months of age are also capable of this - babies can breathe while breastfeeding.

After this age, our vocal apparatus drops lower, thanks to which we become able to produce a wide range of different sounds that form speech. However, after this we can no longer breathe and swallow at the same time.


8. By the shape of a woman’s nipple, you can find out if she has children.

As a rule, in women who have not given birth, the nipple has a cone-shaped shape, while in women who have given birth, it is cylindrical. It is surrounded by the so-called areola with a diameter of 3-5 centimeters. The pigmentation of the skin of the nipple and areola is different from the rest of the skin - it is noticeably darker. In nulliparous women it is pinkish or dark red, in women who have given birth it is brownish.


9. The human body consists on average of 7000000000000000000000000000 atoms.

After the seven there are 27 zeros, approximately the same number of atoms in the human body, weighing 70 kilograms.

10. Regardless of our age, every atom in our body is billions of years older than us.

Hydrogen atoms arose as a result of the “big bang”, about 13.7 billion years ago. Heavier atoms of carbon (constituting 18.5% of our body) and oxygen (65) were born inside stars and were scattered throughout the Universe after the stars died.