Amazing facts about the human body. A person’s chin hair grows much faster than in other places. Moreover, it seems that light and dark hair also grow differently: light faster, dark slower. If a man does not cut his beard all his life, it will eventually grow almost a meter long. And men who shave every day spend about 3,500 hours, or 140 days, or more than four months, doing it over the course of their lives.
A medium-sized human body contains enough iron to forge one long nail, enough sulfur to kill all the fleas that live on a dog, enough coal to make slates for 900 pencils, enough fat to cook seven bars of soap, and enough water to fill a 50-liter barrel.
If the size of a person’s eyes and head were related to each other in the same way as in birds, then they would be the size of a tennis ball. In birds, the eyes occupy about 50% of the volume of their head, and in humans-only 5%.
In our entire life, we inhale about 20 kilograms of dust. Perhaps you could reduce this value a little if you worked as a vacuum cleaner!
Every two weeks, our stomach renews its mucous membrane lining it from the inside.
To avoid a heart attack after intensive sports, you need to rest for 15-25 minutes, and then take a hot shower. On Monday, it is recommended to take a break from sports altogether.
Does anyone in your family snore? We hope not: after all, the volume of snoring can reach 69 decibels. Almost the same noise rises if you have a jackhammer working at night.
Hair on the head, as well as on the beard and in other places, grows faster than anything on our body. An adult produces 35 meters of “hair tissue” per day. This is equal to the length of three buses placed close to each other.
To feel the taste of the food, it must be mixed with saliva. Otherwise, we would not be able to distinguish even the four main tastes. Every day our body produces a liter of saliva, so that in four months we could fill an entire bath with your saliva!
The weight of all the bones that make up the adult skeleton is about one-seventh the weight of the human body as a whole. This is not much, especially when you consider that human bones are four times stronger than reinforced concrete used in construction. Despite the fact that many bones are hollow inside, they can withstand more pressure than an iron rod of the same shape and size.
The pain, the compassion that you feel when you learn about someone’s illness or accident, is always imprinted in your brain. What is incredible is that the brain itself, unlike the rest of the body, does not have nerve elements that perceive pain. People who have brain surgery don’t feel pain at all.
If you try to determine the chemical composition of blood and sea water, you will find that these liquids are very similar.
There is evidence that, on average, right-handers live nine years longer than left-handers. Every year, approximately 2,500 left-handers die from accidents while working with tools designed for right-handers. The smell left by a person’s foot is usually strong enough for another person to follow its trail. Try it and you’ll see what happens. Of course, we are not talking about a subject whose feet are sweating profusely.
A three-week-old human embryo is no bigger than a sesame seed. At the age of one month, its weight is approximately equal to the weight of a letter in an envelope. And his tiny hand at this time is no bigger than a human tear.
During severe mental or mental overload, the brain may stop coping with incoming information. Electrical impulses enter the brain in such a large number that a person comes to a state of extreme excitement. Something like this sometimes occurs to a student on an exam: it seems to him that another second – and his head will burst!
A person can live a month without food, but only a week without water. And without sleep, he can do no more than ten days.
The speed of air when sneezing can reach 160 kilometers per hour-this is more than the maximum speed at which vehicles are allowed to travel in cities in most countries. Microbes that fly out of the mouth when sneezing, fly to a distance of up to four meters!
A man’s brain weighs an average of 1,400 grams, while a woman’s brain weighs 1,275 grams. But this does not mean that a man is so much smarter than a woman.
A person’s nails grow at an average rate of 0.1 millimeters per day, so once a month we get new nails. However, the growth rate is not always the same. So, on the right hand nails grow faster in right-handed people, and on the left-in left-handed people. And of course the record holder is the thumb nail.
The DNA molecule contains information about all the characteristics of a person, and it is stored in a volume not exceeding the volume of an ice cube. If we were able to fully deploy all the DNA molecules in the human body, we would get a thread hundreds of times the distance between the Earth and the Sun.
According to the religious beliefs of the ancient Egyptians, the human body consisted of 36 parts, and each of them was under the protection of a separate God or goddess.
Nerve impulses entering the human brain and signals sent from there to different parts of the body travel at a speed of about 300 kilometers per hour. This is a kind of high-speed train of our body.
To lose weight, it is not necessary to follow a grueling diet or attend a fitness club. If you lick and stick 10 postage stamps on the envelopes, you will already lose one calorie. There are many other ways to reduce weight without getting up from a chair!
The skin in the human body is constantly updated: every hour we lose 600,000 tiny particles of it. By the age of seventy, a person sheds 50 kilograms of skin (of course, it is not lost at all, the main part of it is renewed). The dust that is present in any home is largely made up of dead skin cells.
The bones of a human skeleton that we see somewhere in a Museum are white. But inside our body, they are beige, yellow, light brown, and so on. They become white after they are cleaned and bleached.
Almost two-thirds of our body weight is … water! 92% of water is blood, 80% is brain, 75% is muscle. When the amount of water in the body is reduced by only 1%, we feel thirsty.
Most people on Earth have brown eyes. Blue eyes are much less common. The combination of one brown and one blue eye, like the singer David Bowie, is extremely rare.
The only small bone in the human body that is not connected to other bones is the hyoid bone, and it is located, as its name implies, at the base of the tongue. As for the tongue itself, it is the strongest muscle in the body.
Laughter is incredibly healthy. It reduces anxiety and relieves tension. A six-year-old child laughs an average of 300 times during the day, an adult only 15 to 100 times.
There is a possibility of transplantation of human organs, bones and tissues from one donor to several (up to 50) patients at once. On the other hand. In principle, it is possible to support the life of a person who has had a stomach, spleen, 70% of the liver, 80% of the intestines, one kidney and one lung transplanted.
A healthy heart makes an average of 70 beats per minute. In the intervals between beats (contractions), it rests. About a seventy-year-old man, you can say that his heart rested for 40 years, and 30 years worked.
On average, a person releases 0.5 liters of gases per day. It’s mostly air that we swallow with drinks and food. A smaller part is the gases released during digestion. Fortunately, most of these gases are odorless, otherwise the Earth would not smell like roses.
If you want to grow up a little, you should live in zero gravity. Scientists have found that astronauts who spend a long time outside the Earth become taller.
The largest human organ is the skin. In an adult, its total area is 750 square centimeters, and its weight is 2.7 kilograms.
Human lungs are very elastic, filling them with air is 100 times easier than a balloon. When a person breathes calmly, no more than 10% of the air is renewed in the lungs when inhaling and exhaling. It’s a different matter when they do heavy physical work or play sports. Then this value can go up to 80%.
At the age of two, children learn an average of 16 new words per day. By the age of six, a child has a dictionary consisting of 3,600 words. Over time, this vocabulary increases, and an adult knows more than 100,000 words. A woman speaks an average of 7,000 words a day, while a man has a limit of about 2,000. What’s the problem? Does a man have a smaller vocabulary? Or maybe he thinks that it is necessary to speak only on business?