The human body can be called the most mysterious and perfect masterpiece in the world. Scientists have been exploring for thousands of years but have not been able to fully understand the human body. Did you know that humans are the only animals with chins? Do you know why humans get goosebumps? Do you know that the thumb has its own pulse? Let’s learn about 25 amazing facts about the human body.
1. It’s possible to brush your teeth too aggressively. Doing so can wear down namel and make teeth sensitive to hot and cold foods.
It may be too violent when brushing your teeth. Doing so will wear down the enamel, making the teeth sensitive to hot and cold food.
2. Goose bumps evolved to make our ancestors’ hair stand up, making them appear more threatening to predators.
The reason why our ancestors evolved goose bumps was to make their hair stand up, so that they were more threatening to predators.
The reason why our ancestors evolved goose bumps was to make their hair stand up, so that they were more threatening to predators.
The reason why our ancestors evolved goose bumps was to make their hair stand up, so that they were more threatening to predators.
The reason why our ancestors evolved goose bumps was to make goose bumps stand up, so that they could stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up, so that they could make goose bumps stand up,
3. Wisdom teeth serve no purpose. They’re left over from hundreds of thousands of years ago. As early humans’ brains grew bigger, it reduced space in the mouth, crowding out this third set of molars.
Wisdom teeth has no use. They are just the legacy of hundreds of thousands of years ago. As the early human brain gradually expanded, the space in the oral cavity was reduced, thus squeezing out the third largest molar .
molar['molɚ]: n. molars, molars
4. Scientists aren't exactly sure why we yawn, but it may help regulate body temperature.
Scientists aren't exactly sure why we yawn, but it may help regulate body temperature.
Scientists aren't completely sure why we yawn, but yawning may help regulate body temperature.
5. Your fingernails don’t actually grow after you’re dead.
Your fingernails won’t continue to grow after you’re dead.
Your fingernails won’t continue to grow after you’re dead.
6. If they were laid end to end, all of the blood vessels in the human body would encircle the Earth four times.
If all blood vessels in the human body were connected into a straight line, their length could circle the earth four circles.
7. Humans are the only animals with chins.
Humans are the only animals with chins.
8. As you breathe, most of the air is going in and out of one nostril. Every few hours, the workload shifts to the other nostril.
When you breathe, most of the air is going in and out of one nostril. Every few hours, another nostril will be moved.
9. Blood makes up about 8 percent of your total body weight.
Blood accounts for about 8% of your total body weight.
10. The human nose can detect about 1 trillion smells.
About 1 trillion odors can be detected on human noses.
11. You have two kidneys, but only one is necessary to live.
Although you have two kidneys, you only need one kidney to survive.
12. Belly buttons grow special hairs to catch lint.
Your belly button will grow special hairs to capture lint fibers in your clothing.
lint[lɪnt]: n. thread tip; cotton lint
13. The satisfying sound of cracking your knuckles comes from gas bubbles bursting in your joints.
The "click" sound you hear when you bend your fingers comes from the sound of bubbles bursting in your joints.
The sound of "clicking" that makes you happy comes from the sound of bubbles bursting in your joints.
14. Skin is the body’s largest organ and can comprise 15 percent of a person’s total weight.
Skin is the largest organ in the human body and can account for 15% of the total weight of the human body.
15. Thumbs have their own pulse.
The thumb has its own pulse.
16. Your tongue is made up of eight interwoven muscles, similar in structure to an elephant’s trunk or an octopus’s tentacle.
Your tongue is made up of eight interwoven muscles, similar in structure to an elephant’s trunk or an octopus’s tentacle.
trunk[trʌŋk]: n. elephant trunk
17. On a genetic level, all human beings are more than 99 percent identical.
More than 99% of all human genes are the same.
18. The foot is one of the most ticklish parts of the body.
The foot is one of the most ticklish parts of the body.
Photo by Imani Clovis on Unsplash
19. Extraocular muscles in the eye are the body’s fastest muscles. They allow both of your eyes to flick in the same direction in a single 50-millisecond movement.
Extraocular muscles are the fastest muscles in the human body. They allow your eyes to sweep in the same direction in 50 milliseconds of motion.
extraocular[ɛkstrə'ɑkjəlɚ]: adj.
20. A surgical procedure called a selective amygdalohippocampectomy removes half of the brain’s amygdala—and with it, the patient’s sense of fear.
A surgical procedure called “selective amygdala hippocampectomy” removes half of the brain’s amygdala—and with it, the patient’s sense of fear.
A surgical procedure called “selective amygdala hippocampectomy” removes half of the amygdala in the brain, thereby eliminating the patient’s fear.
21. The pineal gland, which secretes the hormone melatonin, got its name from its shape, which resembles a pine nut.
pineal gland is called this name because its shape looks similar to pineal gland.
22. Hair grows fast—about 6 inches per year. The only thing in the body that grows faster is bone marrow.
Hair grows very fast: about 6 inches (15 cm) per year. The only thing in the body that grows faster than hair is: bone marrow.
23. No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
23. No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
23. No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
23. No one really knows what fingerprints are for, but they might help wick water away from our hands, prevent blisters, or improve touch.
23.
24. The heart beats more than 3 billion times in the average human lifespan.
Calculated based on the average lifespan, a person's heart can beat more than 3 billion times in his life.
25. Blushing is caused by a rush of adrenaline.
Blushing is caused by an adrenaline surge.
Source: Mental Floss, Kendian.com
Editor: Danni
