Science is constantly evolving and day by day it penetrates further and further, making amazing discoveries one after another. However, in order to encounter something unknown and look into the eyes of something new, it is not at all necessary to travel several thousand light-years beyond the Milky Way, because the mass of the fantastic lurks closer than it seems. Namely - in ourselves.
The human body is a unique mechanism. Even now, when, for example, we are reading this article, he performs thousands of processes at the same time, most of which we do not even suspect! Despite all the attempts of scientists, the human body still has not revealed to us all its secrets. We have compiled the 10 most interesting facts about the human body.
10. The eye has a resolution of 140 megapixels
Quite often, people who are fond of photography, and specialists from other professions, show interest in their own eyes. Our vision in its device is similar to a camera.
Make sure you: the cornea plays the role of a protective filter, the pupil is the lens with a lens inside it (lens).
The iris acts as a diaphragm, and the retina is the matrix. According to the laws of optics, as well as in the camera, the image on the retina of the eye turns upside down. It is already turning our brain back over, like a processor in a camera.
Directly comparing the image quality of the human eye and the digital matrix is slightly incorrect due to a completely different mechanism for obtaining images. Nevertheless, studies were conducted during which, by implicit signs, the so-called “megapixel” of our eyes was determined. If we compare the pixels with the photosensitive elements of the retina, then in each eye there will be an order 140 megapixels.
9. Nose and ears grow all life
Scientists from Switzerland conducted an interesting experiment - they measured the noses and ears of their compatriots. As a result of this experiment, it turned out that these parts of the body do not stop growing throughout a person’s life! This can be explained by the fact that the human skeleton is gradually ossified, and the cartilage tissue is replaced by bone. But just not the skeleton of the nose - it will always remain cartilaginous, thanks to which it has the ability to grow and change shape throughout your life. The auricle is in turn grows by 0.22 mm per year.
But this is not the only explanation for this phenomenon. The tissue of our skin loses its elasticity with age and sagging, because of which the nose begins to appear visually more and more. Earlobes also begin to stretch over time and sag.
8. Toenails grow faster than toenails
The fingernails grow by about 4 centimeters per year, which is about three times faster than the speed with which the toenails grow. There are a lot of guesses about this. One of the most common versions is the difference in blood circulation in different parts of our body, namely on our limbs.
Nail growth directly depends on the movement of blood: if blood moves more often and faster, then the nails grow more actively. And the fingers, as we know, are involved in our daily activities more often than the toes.
7. In the morning, our body is a centimeter higher than in the evening
At the time of awakening, we taller than in the evening, by 1 centimeter. The reason for this is the cartilage in the body, which is in an unclean position in the morning, and in the evening, after a long walk and certain actions are performed during the day, they are compressed. You can also observe a decrease in growth after increased physical exertion, but this effect is not long-lasting, and growth is restored quite quickly.
The maximum difference in growth can be noticed after training with a barbell and weights: due to the compaction of the intervertebral vertebrae, changes in growth can be 3 or more centimeters.
6. The speed of a sneeze reaches 160 km per hour
In those moments when allergens, germs and dust accumulate in large quantities in the nasal cavity, the sneezing mechanism starts. There is, of course, another option - you slightly overdo it with spices during cooking.
At this moment, the nerve plexuses are excited and the person sneezes, ridding the body of all the excess that could be in his nasopharynx.
Well, if at this moment no one is near you, or you cover yourself with a handkerchief or hand: when you sneeze, the speed of the air you exhale can reach 160 kilometers per hour, and one such sneeze may contain more than 100 thousand pathogenic bacteria.
5. For one step involved about 200 muscles
In the human body, there are more than 640 muscles. Even for such a simple action as walking, our body continuously uses about 25 percent of all muscles. In order to take just one step, a person needs to reduce and relax in a certain sequence over 200 muscles.
Depending on the anatomical features, this figure may vary slightly, but the essence will remain the same. This fact once again confirms that all the muscles of the body interact closely with each other.
4. The brain does not feel pain
It is impossible to feel pain without a brain, but the brain itself does not hurt. Suppose you scald a hand, or cut a finger. The nerve center instantly sends impulses to the brain, which in turn decrypts the experienced sensation as pain.
In the case of the brain itself, the mechanism is similar: the nerve fibers of the brain send themselves the same signals as with a cut finger. However, there is simply no data center for them.
3. A person can survive without food for 2 months
Agree, you are much more pleasant to have fun until the morning than not to eat for a long time? Alas, this feeling is extremely illusory. The average person can survive without sleep for no more than 3-4 days, while making incredible efforts. Without food (with enough water) he can live a month and in some cases even twowhile supporting the strength of body fat accumulated in the body.
2. The diameter of male hair is twice that of female
Yes, this is a proven fact. However, the fair sex should not be upset: female hair is inferior in diameter, but not in its "vitality", and each of them rests on the head for about 4-5 years.
A lot of amazing things are in the genes. The thickness of the hair can also vary depending on the race, and even the natural color of the hair affects their diameter. Red hair - thin, natural chestnut or black - is much thicker and denser, thereby increasing the density of hair.
1. The heart can beat outside the body
Scientists of the world are inventing devices that can save the heart, which has already stopped beating in the body of the donor, and testing organ support systems. However, the surprising thing is that the heart itself is able to beat outside the body. The heart is the only muscle in the human body whose contractions the brain does not regulate. If you take your heart out of the chest, just like in the Indiana Jones movie, you will notice an amazing phenomenon - for a short time it will continue to beat!
And all because the heart has its own electrical system and is able to receive electricity from the air surrounding it, and as long as there is enough oxygen energy, it will be reduced.