1. The liver is the only internal organ in the human body can regenerate itself due to injury or partial loss due to donation, requires at least 25% of the liver to function properly. However, the ability to recover depends on each person’s physique.
2. The human hand is one of the most sophisticated organic tools on the earth. With a large number of dense neurons, the human finger can sense objects as small as 13 nanometers and with tremendous accuracy. What’s even more amazing is that the human finger has no muscles and relies on the muscles and tendons of the palm and arm for control.
3. In medicine, there is a concept of “sleep debt”, That is, if you have a long-term lack of sleep, sleep debt will accumulate, affecting not only your mood, work performance, but also memory loss, attention and judgment, and even cause depression. other serious illnesses.
4. The extraocular muscles are the fastest contracting muscles in the human body, they can make your eyes rotate for 50 milliseconds and blink for 100 to 150 milliseconds.
5. The iron in an adult’s body can forge a 3-inch nailcarbon can make 900 pencils, fat can make 7 bars of soap, phosphorus can make 2,200 matchsticks, and water can fill a 50-liter bucket.
6. The longest bone in an adult is the femur, It is about 40 to 50 cm long, while the shortest bone is the ‘stadal bone’ in the ear, only 0.25 cm, but its role should not be underestimated, damaged stapes can cause problems about hearing.
7. Some people can “see” the color of sound. This is not an illusion but a real existence. Scientists call this “synaesthesia” – a Greek term for perception from the combined senses. The famous painter Van Gogh is a sufferer of this condition. Scientists estimate that about 1 in 25,000 people have synaesthesia.
8. Why are men’s “eggs” outside the body? Believe that this is what many guys are wondering. In fact, because sperm is very sensitive to temperature, a human body temperature of 37 degrees will make sperm unable to live, so it is necessary to place the scrotum and testicles outside the body to regulate the temperature.
9. When you hear your own voice in the recording, believe that many people will feel it is different from what they imagined. This is because our skull changes the resonance of our voices from within and produces more bass, so while it feels strange, others hear your voice exactly as it should. in the recording.
10. If you look closely, you will see a small hole in the lower eyelid helps tears flow into the nose, which is why when you cry you often get a runny nose.
11. Your brain can always see your nose, but the brain ignores it through a process known as “unconscious selective attention”.
12. The world record for the highest human body temperature is 46.5℃ (110 degrees F), this record was set by a black man with a fever in Georgia, USA, and even more miraculously, he survived 24 days in the hospital. Under normal circumstances, if the body temperature goes above 39°C, it can cause damage to brain cells, which is commonly referred to as brain burn. Therefore, fever should not be taken lightly.
13. The tonsils are a very intelligent organ, Located near the throat, this is the only way to eat and breathe, the function of the tonsils is to guard this important gate and quickly alert the body when bacteria and viruses are detected.
14. The only bone in the human body that is not connected to other bones is the “hyoid bone”, located in the neck and connected only by muscles and ligaments. Its main function is to support the tongue, assist in swallowing and other actions.
15. Breathing through the mouth for a long time will make the jaw slow to develop, crooked teeth, affecting the shape of the face, in severe cases, it also causes a lack of oxygen to the brain, which leads to lethargy and unresponsiveness. Therefore, if you notice that your child has this habit, you should correct it as soon as possible.
16. About 70 billion cells die in our body every day, and in about 10 years, almost all the cells in our body are replaced. However, some cells are not renewed, such as neurons, so it is difficult to recover from a traumatic brain injury.
17. Our stomach acid is a strong acid that corrodes metals like iron. However, be aware that if you accidentally swallow metal, it won’t stay in your body long enough to dissolve, so it’s best to see a doctor.
18. Many people may think that when a woman is pregnant, the baby is in her belly will only continuously demand from the mother’s body, which will also lead to different pregnancy reactions. But in fact, the fetus is also protecting the mother in its own way, the fetus secretes a type of stem cells to improve the mother’s immunity and help her repair damaged organs.
at Blogtuan.info – Source: Eva.vn – Read the original article here
