Tuesday , July 27 2021

9 parts of the body m & # 39; still we need anything (and what they were doing before)



Body & # 39; & # 39 b wife; mark & ​​# 39; question.The picture of copyright
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Caption of & # 39; image

Some people keep certain muscles or body parts m & # 39; għadniex use but others lost.

Anthropological point, are called "evolutionary relics."

These are our body parts m & # 39; have no use for functions that develop in & # 39; modern life. But not always been so.

All met specific function (and f & # 39; very vital cases) for our ancestors.

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Although not everyone keep them, these are some of the most common, as revealed by Amir Dorsa, anthropologist of & # 39; evolution of Boston College, in the United States, the gateway Business Insider

You dare to examine you?

1. Appendix

It is probably unusable part of the body most well known.

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Scientific research suggests that the body helped plant digestion Excessive cellulase that were part of the diet of our ancestors.

The picture of copyright
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Caption of & # 39; image

As in the wisdom teeth, the appendix sometimes cause discomfort and be removed.

As our diet has become more diverse, the appendix has lost its function, noted Amir. Of course, it indicates that there are more and more studies show that the appendix can & # 39; continue to have a role today bacterial store Our gut.

2. Longshot

Not everyone has, but it's a muscle that goes from wrist to elbow.

If you extend the arm with the palm & # 39; id & # 39; over and made the finger & # 39; great b & # 39; fingers forming a sort of & # 39; cone, you & # 39; see thin and straight protuberanza extending around the arm. It is not the root, is softer.

10% of men have already lost, scientists attest, but before it was used to help our ancestors exert the required force to climb trees.

wisdom teeth

Its function was hard grind raw meat and cereals which fed our ancestors. Now, as explained Dr. Amir, our diet is much more flexible and m & # 39; no need to chew intensively. Neither left our jaws not as strong as they were millions of & # 39; years ago.

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Caption of & # 39; image

Our diet is now much smoother and m & # 39; still we need to nigddu as hard or as long as this molar are not required.

Not everyone bring them all, sometimes even nothing, but if they do, usually causes very painful and sometimes are also recommended to be removed.

  • The dental roots

4. Muscle pull pili

In the past we had a lot more hair in our body now. The muscles arletturi of pili, Attached to the hair follicles, they helped to diffuse hair and thus appear larger in & # 39; & # 39 situation, risk or threat.

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Today m & # 39; we need it, but can & # 39; be noted that many holding hairy mammals, such as cats.

5. embryonic tail

Even today, between five and eight weeks after conception occurs, the fetus begins to develop tail born before vanishing to form what we know today as the coccyx.

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Caption of & # 39; image

According to British Encyclopedia, sometimes there are still cases of babies born rich tail removed at birth without major complications.

This tail used to go and hold the balance. When learned encountered, tliftuha because it was more useful.

6. Muscle ear

They are responsible for conducting the visible part of the ear, but few people have control over them, explained the anthropologist. Some mammals use them to detect prey or predators and it is believed that humans used them for the same thing.

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Caption of & # 39; image

These muscles helped discover sounds when we were still hunting as a means of & # 39; living.

7. Muscle pyramid

It is located in the abdomen of & # 39; down and be triangular. There are people who m & # 39; and there are no two people who have.

They only serve to move the light line (the line that goes from the party & # 39; bottom of the breast to belly, the navel longitudinally by dividing the navel).

Today m & # 39; has no use but it is believed that in the past, when we have moved on Wednesday, is facilitating the mobility and turning the abdominal muscles.

8. male nipples

The nipples meet, biologically, specific function: facilitate breastfeeding.

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Caption of & # 39; image

The male nipple m & # 39; have no biological function but were formed before the chromosomes determined the sex of the baby.

But since they are lactating women, why men are born with them? The reason is that the body & # 39; embryos, whether female and male, starts to develop in the same way.

When testosterone, responsible for the formation of & # 39; male sexual organs start acting, the nipples already developed.

9. The third eyelid

This fold is located at the corner of & # 39; inside of the eye and seems like membranes that some animals such as birds, reptiles and even some mammals to protect the eyes.

they used to keep them moist and free from waste, But in the case of the few remaining humans nothing & # 39; residue and moreover, do we have any kind of & # 39; power over them.

The picture of copyright
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Caption of & # 39; image

Reptiles preserve these membranes help wetting the eyes.

"It is not clear exactly why the men m & # 39; still have it," said Amir, "but the fact is that it is rare to jinstabuhom among primates, so we tliftuhom long time ago."

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