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10 false facts about the human body

 

Despite the fact that it is now easy to get any information, there are still myths, transmitted from generation to generation. We are so used to believe the axioms. Many of these misconceptions concerns the health of a person, his body and dietary habits. The modern scholar is not difficult to prove that it is false facts that should not be trusted.

10. Will be 7 years before digesting chewing gum

Swallowing gum is not necessary, because in large quantities it can cause bowel obstruction. However, a small piece of chewing gum will not cause any harm and will, as all undigested residues. When we eat the food through the esophagus into the stomach. There it is processed with acids and enzymes begin to break down. Then enters the intestines, where it continues its disintegration. Nutrients are spent on the needs of the body, and the undigested waste is transported into the colon. The basis of chewing gum is not digested by stomach, but she remains there and displays as well as other unprocessed residues.

9. The ability to collapse the language of the "tube" — hereditary

Previously, many scientists believed that the ability depends on genes. If the child's parents can do it, then it should work. In 1940 Alfred Sturtevant found that this ability is determined by a dominant gene. Now, this statement is not considered to be indisputable. Modern scientists do not deny the fact that genetics affect this ability. But there are other factors. Philip Matlock collected 33 pairs of twins and asked everyone to curtail language a tubule. Most of them confirmed the theory of Sturtevant, because both twins either could do it or not. But among them were 7 pairs in which one possessed this skill and the other does not. This means that you can explain everything by genetics will not work.

8. Carrots improves night vision

A common misconception is that if you want, you can learn to see in the dark, if there is a lot of carrots. It contains lots of beta-carotene, which is converted into vitamin A. It is required for the production of proteins of opsins and rhodopsins. If the body lacks vitamin A, the person begins nyctalopia. It is a special disorder of vision in which he sees at dusk. This means that foods rich in vitamin A, can help, provided that the person is sick, and improve night vision a healthy person, they can not.

7. We only use 10 percent of the "power" of the brain

This myth appeared in the middle of the last century, when the brain knew not so much. Scientists discovered that the brain consists of neurons that create electrical signals. And "working" only part of the neurons, others do not generate impulses, i.e. "lazy." In the brain billions of neurons, so it is impossible to measure all of their activity. Then took a small part of the brain and determined the percentage of active neurons. This percentage was small. And scientists have concluded that a large part of the brain is not involved. But the brain is a complex structure, each area which is responsible for something. All neurons at the same time can not work. So when we walk, begin to work the neurons responsible for the process of walking. If we don't move, they become inactive. When we are silent, cease to operate, the neurons that control speech. That is, we use our brains to the maximum, but at different times work for different region.

6. If you regularly shave the hair, they will grow thicker and darker

Doctors-trichologists say that it is a common misconception. Man is born with a certain number of hair follicles. Regardless, shave man hair or not, it no longer becomes. As for color, children's hair becomes thicker and darker with age, regardless of whether they shaved my head as a child or not. Shaving does not affect hair this is a proven fact.

5. From chocolate Teens have pimples

There is no scientific evidence proving the link between eating chocolate and acne as adolescents, and people of other age categories. Studies were conducted to confirm or refute this assertion. Jennifer Burris, lead author of this work, who with his team analyzed the data 1960-2012 years, says they are not sure whether chocolate can cause outbreaks of acne, it increases the inflammation. While there is no data, citing that it would be possible to speak about influence of chocolate on the acne. But over time, it is possible that scientists will be able to prove this relationship.

4. We lose the most heat through the head.

This myth appeared in the 1950s, and in 2006 he was able to refute. People were placed in cold water, dressed them in a suit. The head remained above the water, then plunged into her. And checked how much heat was lost to the body. The calculations showed that the heat loss depends on the area of the skin and about the same everywhere. Over the head we lose about 7% of the heat. In 2008 has carried out repeated studies have confirmed that through it may take from 7 to 10% of the heat.

3. We have five senses

Aristotle wrote about the existence of 5 senses: hearing, sight, touch, taste and smell. But modern doctors believe that it is not. While scientists don't agree exactly how many senses in humans. Some believe that only 3. Other account for up to 33 different feelings. We feel the imbalance, we have the feeling of pain, etc Most scientists believe that we have a 21 sense.

2. Hair and fingernails continue to grow after death

In order to grow, they need glucose. When people die, their cells are not getting nutrients. It's just a myth, but he appeared not accidentally. After death the human body dehydrates, causing changes in the structure of the skin. Part of the nails or hair that was under the skin become visible. Because of this, it seems that they grew up in.

1. The habit of cracking knuckles can lead to arthritis

There are no studies that have proved that the habit of cracking your fingers can cause significant harm. Several groups of scientists tried to find this relationship, but none of them was able to prove that fans of the exercise later, there is arthritis. The only thing that managed to find out, Jorge Castellanos and David Axelrod, that because of the habit to crack your fingers the weaker man begins to squeeze his hand, he has a more noticeable swelling. But it is possible that these health problems are caused by disorders of the joints, not the habit.

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