Man is the most amazing creature created by nature! How many discoveries have been made in the field of studying human physiology, and how much is still unknown and inexplicable in this small universe - our body. Some interesting facts about people below will help the reader learn something new.
Brain
The least studied human organ is the brain. And although scientists have managed to solve many secrets of this incredibly complex organ, more and more new information about its functions and capabilities appears. Therefore, we consider some interesting facts about people, starting with him.
Do you know that the brain requires the same amount of energy that a ten-watt bulb consumes? It turns out that it is not in vain that in cartoons a flashed light bulb is depicted above a person’s head when a smart thought arises in the hero’s head. This association has the right to life, because it is not far from the truth. Even in a dream, the brain generates as much energy as a small light bulb.
Oddly enough, the greatest brain activity manifests itself at night, and not during the day. It would be logical to assume that night “lying” in bed will require much less energy than the numerous complex manipulations that a person performs during working hours. But scientists have found the opposite - it turns out that when a person "turns off", his brain "turns on". And although there is no scientific explanation for this yet, it’s worthwhile to thank this “hardworking” organ for its hard work during sleep, especially since it gives us pleasant visions.
Blood
Interesting facts about human blood are no less exciting. Back in 1971, 25-year-old observations of Dr. Rachel Naomi were published, in which she claims that a lot depends on the blood type - human behavior, character, manners and feelings. Moreover, women with blood of gr. B live much longer than women with blood of gr. 0. And men with gr. B, on the contrary, live less than with group 0. Unfortunately, these statistics do not yet have a scientific explanation.
But did you know that if you stretch all the blood vessels of an adult in a straight line, you will get a vessel longer than 95, 000 kilometers! And it was also calculated: to suck out all the blood from a person according to the forces of 1, 120, 000 mosquitoes!
The heart, pushing blood throughout the body, creates such pressure that it can explode with a powerful stream of more than 9 meters.
In 1 second, 25 billion cells have time to rush through the human circulatory system.
It turns out that human blood has the same density as sea water, but it is much denser than fresh water. And in 1 second, the bone marrow gives birth to 3 million blood cells, but in just 1 second it destroys the same amount.
Intestines
And here are other interesting facts about human organs. The largest internal organ is the small intestine. It turns out that if you compare the length of the small intestine with the growth of the average adult, then it will be four times as much.
The acid in the stomach for digesting food is so aggressive and strong that it can dissolve a razor! Of course, you do not need to check these data on your stomach, but ordinary hydrochloric acid, similar to gastric acid in some respects, easily dissolves many types of metals.
Lungs
It turns out that the right lung is larger than the left, and you know why? Everything is simple - the heart is on the left, and the left lung is forced to “make free" a place for it.
In the pictures it is customary to draw the same parts of the lungs, although in reality they are slightly different. The human heart is located quite centrally, but slightly tilted to the left side, as if crowding out the lung.
Leather
It is difficult not to mention such an external organ as human skin. Interesting facts testify to its amazing capabilities. This largest body organ in area is about 2 m 2 and weighs 2-4 kilograms.
Distributed in the skin: 500, 000 receptors of touch, 1 million painful endings and 3 million sweat glands. Every minute she passes 460 ml of blood through herself. For every square centimeter of skin, there are six million cells.
Throughout the life of the "owner", it is updated about a thousand times. Full renewal of adult cells occurs in 26-30 days, and in infants - in 3 days.
Sweat glands located in the skin regulate body temperature. If the total number of them is from 2 to 5 million, then most of them are on the feet and palms - about 400 glands per 1 cm 2. Third place is occupied by the forehead, where there are 300 glands per 1 cm 2. Almost a liter of sweat is released during the day, and in some people even more. Africans and Europeans sweat more than Asians because they have more sweat glands.
The sebaceous glands work so actively that they can release about 20 grams of sebum per day. What is it for? This is necessary for the implementation of the main function of the skin - protective. The produced fat, mixed with sweat, forms a protective film that protects against bacterial and fungal attacks from the outside.
The thinnest and most delicate skin covers the eyelids, and the thickest is on the soles of the feet, where its thickness reaches half a millimeter.
Everyone noticed that after a long stay in the water, the skin becomes wrinkled. So this is no coincidence. To prevent wet fingers from slipping, nature envisaged making such peculiar temporary “protectors”.
In 1901, dermatologist Alfred Blashko made the discovery that human skin is divided into invisible bands, which appear only in certain diseases.
Eyes
And what about your vision, and how many interesting facts about the eyes of a person are known to you?
Most newborn babies have gray-blue eyes, since the pigment in the iris is formed by the first year. Interestingly, the color and width of the pupil change throughout life. In infants and the elderly, the pupils are narrow.
Other interesting facts about people say that in a healthy person, the pupil is always black. In old age (with lens compaction and cataract development), it becomes cloudy.
Try to quickly look around the room and notice how many different distances you are focusing at the same time. The lens of the eye changes its focus sharply even before a person has time to realize this. You can compare this fact with the action of a photo lens that takes a few seconds to focus from one distance to another. So, the eye lens is much faster than the camera lens. If he did not possess such an amazing ability, then the surrounding objects would go out of focus all the time and enter into it.
A person blinks about 15, 000 times a day. This function is half-reflex, that is, it occurs automatically, although if necessary, a person may not blink for a long time.
This function helps to remove mote from the surface of the eyeball and “refresh” with a clean tear, which saturates the eyes with oxygen and has an antibacterial property.
It turns out that when the eyes begin to dry, they give off water. In fact, a tear consists of several substances: water, fat, mucus, which must be in strict proportions. If the compliance is broken, the eyes may dry, and in this case, at the command of the brain, tears are released.
What do other interesting facts about people say? The English chemist John Dalton did not distinguish red. When the gardener brought him a bouquet of red roses for drawing still lifes, the scientist depicted blue flowers. From here came the original expression, "Dalton Blue Roses." John described his condition scientifically, and later the disease was called color blindness.
Heart
Many interesting facts are known about the human heart as the most important organ on which life itself depends. So, for example, in a Mexican prison, a criminal was awaiting execution of a death sentence. His last wish was permission to watch the World Cup. In one match, his favorite team lost, and a heartbroken criminal unexpectedly died of a heart attack. It happens.
Over the course of a person’s life, a heartbeat occurs approximately 3 billion times. A beating of the heart is the moment of closing the valves.
Egyptian papyruses symbolically depicted the human heart as an ibis, hiding his head under the wing. And in ancient Rome, it was believed that the ring finger is associated with this organ. By the way, it was from here that the tradition to put on wedding rings on this finger went.
If for 45 years you do not turn off the water tap at maximum pressure, then the volume of leaked water will be equal to that which the heart pumps over the entire human life.
Sensory organs
The organs of smell, touch, taste, sight, hearing are all the organs of human senses. Interesting facts about them are so varied and numerous that you can’t tell about everyone. We will describe only a few that not everyone has heard of.
Touch receptors are found not only in the skin, but also in some muscle groups, joints, and even on the mucous membranes.
If you touch your hands slightly, then the person’s heart will begin to beat slower and blood pressure will drop slightly.
As a result of the experiment, scientists made an interesting observation. A group of 40 premature babies was divided in half. In the first group of children, they stroked gently every day for one hour, while the children of the second group did not. After 10 days, all the children were weighed, and it turned out that with the same nutrition, those children who were fondled, gained 47% more weight than those who were not touched.
By the way, do not be surprised if you hear that a person recognizes the taste of food not only in his mouth. It turns out that there are 5 million olfactory receptors in the nose, which contribute to the identification of about ten thousand different smells and at the same time affect the recognition of food. Scientists have found that taste sensations are more than half due to the influence of olfactory receptors.
Nails
What other interesting facts about people can I recall? Well, for example, did you know that the fastest growing nail is on the middle finger? It is noted that on the middle finger of the dominant hand (right-handed or left-handed), it grows fastest. Scientists have not yet figured out why this is so. But we can assume that the nail growth rate is somehow related to the length of the finger. Based on what, we can conclude that the nail of the longest finger should grow faster than the others, and the shortest - slower.
