Body

Our body is an incredibly complex machine that works through billions of mechanisms. It develops, responds to our environment and evolves with the passage of time. And thanks to science, one understands better and better its extraordinary functioning. Here are some amazing facts about our fascinating body:

Tongue is the part of the body that heals the fastest

• The tongue is one of the organs that contain the most blood vessels. The cells that participate in the healing process can thus arrive more quickly and in greater number on the wound. In addition, saliva contains opiorphine, a natural substance that is as effective as morphine in fighting acute physical or inflammatory pain. In all cases, infections of the mouth are extremely rare: this is due to the action of enzymes present in the saliva.

Your nose does not grow throughout your life

• It grows until you are 18 or 19 years old. As you age, the ligaments that hold the cartilage in your nose stretch. This makes the nose fall, and that is precisely what makes it look bigger.

Astronauts grow several centimeters in space due to lack of gravity

• Without the pressure of gravity, the inter-vertebral discs swell, which lengthens the spine. The astronaut can thus take up to 7 centimeters in space. Once they return to earth, they return to their normal size after a few days. And according to testimonies, this is very painful.

Your nails do not grow at the same speed

• In general the nail of your middle finger is the one that grows faster, and that of your thumb is the one that grows more slowly.

If you sneeze with your eyes open, your eyes would not come out of their orbit

• An urban legend says that your eyeballs would come out of their orbit in case of sneezing with their eyes open. Rest assured, this is quite impossible because your respiratory system and your eyes have no connection between them. However, scientists still do not know exactly why it is so difficult to sneeze with open eyes.

More than 3/4 of your brain is made up of water

• Water represents between 70% and 80% of your brain tissue. The good functioning of your brain therefore depends largely on your hydration. This is not a legend: water is a real engine for concentration and memorization.

The fact that he can wrap his U-shaped tongue is not a genetic inheritance

• Unlike a popular belief, this labial gymnastic prowess is not inscribed in your genes. One study showed that in some monozygotic twins, who have exactly the same genetic heritage, one could roll his tongue, the other not.

Slightly less than one in every 10,000 people has mirrored organs

• There are many possibilities for a right / left inversion of organs. Some people have the heart located right, for example. This feature is called situs inversus.

At birth, the bones of the infant's skull are not welded

• The plates of his skull are separated by membranous spaces called fontanelles. They are of the same nature as the carapace of turtles.

The most powerful muscle of the human body is located in the jaw

• The strongest muscle in relation to its size is not the tongue, which is an organ and not a muscle, but the masseter. It is the muscle which serves to raise the lower jaw, and thus to chew.

Your skin weighs about 3 kilos and a half

• The skin is one of the longest and heaviest organs in humans. In adults of 70 kg, it measures about 2 m2 for 3 kg in women and 5 kg in man.

Every second, nearly 2,000 cells die naturally in your body

• This applies to a healthy "average" adult. And this represents between 50 and 70 billion cells less per day! Rest assured, your body is made up of about one hundred trillion cells and ten times more bacteria. This represents 7 billion billion billion atoms.

If the human eye was a digital camera, it would have 576 megapixels.

• For comparison, the camera of the most recent smartphones are 8 megapixels.

Children and adults do not blink in the same way

• Infants only blink once or twice every minute, against once every 6 seconds in adults. According to one study, women who take the contraceptive pill blink 32% more often than the average female. No scientific explanation answers today to this mystery.

Approximately 10,000 taste buds are spread over your tongue

• And their lifespan is from 2 days to 3 weeks. Each papilla - composed of 50 to 100 cells - transmits information about the perceived flavor to a neuron.

You produce just over a liter of saliva every day

• At the end of your life, you will have produced nearly 33,000 liters of water, enough to fill a tanker truck.

You have less bone growing

• At birth, the human being has 270 bones. Growing up, he has only 206. But do not worry, they do not come out of your body as if by magic. Some of them merge together to form larger sets.

The sweat itself has no odor

• When the sweat is secreted by the sweat glands, it feels nothing. The odor is due to a bacterium produced by the skin that feeds on sweat. This bacterium emits chemical compounds with more or less pleasant odors.

A quarter of the bones of your body are in your feet

• The body of an adult is composed of 206 bones, and each foot contains 26 bones. The calculation is simple: 52 bones out of 206 are in our feet, which represents a quarter of all our bones.

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