You probably think you know your body well. In the end, you are the one who feeds him, cherishes, looks in the mirror and uses him to go through this world. But did you know that we have common DNA with bananas? Or that our growth is changing every day? Or that most of our cells are not human? This is all true! So read on and enjoy all the amazing things you did not know about the human body.
1 1. We can see a distance of up to 48 kilometers
There are approximately 3000 times more stars in our galaxy than people on Earth.
2 There is an entire ecosystem in our navel
We cannot see them, but the human body contains trillions of tiny organisms, such as bacteria, millions of which live inside the navel. Relatively speaking, there are so many bacteria in the human navel alone that they could form an ecosystem the size of a rainforest.
3 Our skin never stops growing
Given that we produce 25 million new cells in every second of time, we have new layers of skin. During their lifetime, people lose up to 18 kilograms of skin.
4 We are completely covered in hair
In nature, there is no such thing as a bald man. Each person, including women, has as much hair per square centimeter of a body as chimpanzees. The hairs are so short, light and thin that most of them are almost impossible to see with the naked eye.
5 In our lungs - 1609 kilometers of capillaries
If you stretched 300 million capillaries in your lungs from beginning to end, the line would stretch for approximately 1609 kilometers.
6 Our cells never stop reproducing
Cells are the building blocks of the body. Every second, the human body produces 25 million new cells. For comparison, for every 2 seconds the cells in our body produce more than the population of Ukraine.
7 We almost always have sex
This fact applies to humanity as a whole, rather than directly to the human body, but nonetheless. Every day, intercourse occurs around the world approximately 120 million times.
8 Our nerve impulses travel at a speed of 402 kilometers per hour
The sensation of pain, in fact, comes instantly when you touch something hot or are pricked with a needle. Thanks to our highly developed nervous system, we can respond in less than a millisecond to things we should stay away from. Nerve impulses are so fast that the electrical signals responsible for sensations travel to and from the brain at an average speed of 402 kilometers per hour.
9 We have more than five senses
People have five basic feelings. We also have over 10 other important feelings, such as balance, temperature, pain and time. We have inner feelings of suffocation, thirst and fullness. However, none of them can be described as the sixth - that is, the ability to see dead people.
10 People are “glowing”, you simply cannot see it
Like deep-sea creatures, people are naturally bioluminescent, which means that we glow in the dark. However, the light we emit is incredibly weak. So much so that human eyes cannot distinguish it.
11 Our tears know our emotions
People make differently structured tears depending on the reason we cry. Emotions such as grief, guilt, sadness or happiness lead to a fundamental change in the molecular structure of tears. Like a snowflake, not a single tear is like the other at the molecular level.
12 Our brain is mostly composed of water
Our brain has less flesh and tissue than fluid. Our brain is 80 percent water. By the way, most of the human body is made up of water.
13 Our sneezes are stronger than the wind
Sneezing has a practical function. It cleanses the nasal cavity and throat from any congestion. The power of sneezing is so great that it exceeds a speed of 160 kilometers per hour.
14 We have common DNA with bananas
You have probably already heard that people differ from chimpanzees by only one chromosome. DNA is so precise that the slightest change can turn you into a whole new look. As it turns out, people share 50 percent of their DNA with a normal, ordinary, and tasty banana.
15 Our brain does not feel pain
The brain can perceive and process feelings of pain coming from other parts of the body. However, the brain itself is not able to feel pain. There are no pain receptors in the brain like those in your arms, legs, or other parts of the body.
16 In the human body - more atoms than stars in the universe
All matter is made up of molecules, and molecules are made up of atoms. An adult consists of 7 octillion atoms (this is 7 with 27 zeros after). This is more than twice the current number of stars in the universe.
17 Our growth is changing every day, and several times
The human body grows at night. People are 1 centimeter taller in the morning than in the evening. During the day, the discs in the back begin to shrink, and our body becomes shorter.
18 Our bones are as hard as granite
It may seem to us that human bones are fragile. However, bones are as strong as granite. Just one piece of bone, the size of a matchbox, can support a weight of 8 tons.
19 Our heart is stronger than any other muscle in our body.
The human heart must be strong enough to pump blood through each vein in our body 24 hours a day and 7 days a week. It is so strong that it can generate enough pressure to spray blood up to a distance of 9 meters.
20 Most of our cells are not human.
Of the billions of cells that make up the human body, only about 10 percent are actually “human”. The remaining 90 percent consists of various fungi and bacteria.