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Ten mistakes of nature.
Do you have bodies that you do not use? Scientists believe that there is. According to the theory of Charles Darwin, some "unwanted parts of the body" show our connection with distant ancestors, and perhaps someday will fall off as the tail of a lizard. Here are the top 10 "errors of nature."
Appendix 1. a person
In the appendix of herbivores large in size, and its main function - to help in the digestion of food of vegetable origin. In humans a long time, the role of this small part of the large intestine remained unclear, because the value of the appendix in the digestion is quite small.
According to biologists and paleontologists believe this process was a legacy from our ancestors, eat mainly foods of plant origin.
Recent scientific studies indicate that the appendix plays the role of the immune defense, because it contains a significant amount of lymphoid tissue. Atavism or not, but the appendix is often reminiscent of its existence: thousands of transactions each year, and hundreds of deaths.
(10 ph + text)
2. The breast and nipple in men
The feasibility of the mammary glands in men and is still in question. Some people speculate on this, they say, does not indicate whether it is that not one of Adam's rib Eve was created, and vice versa? Scientists also explain the similarity of the anatomical structure of the body so that the early stages of embryogenesis fruit male and female flows equally.
Only then included the mechanisms that determine the presence and severity of secondary sexual characteristics. By the way, breast cancer suffer not only women, but also the stronger sex. In addition, some men have sometimes appears milk. This may indicate serious diseases neuroendocrine nature.
3. Males have hlistohvostyh lizards
This type of male lizards do without. Toddlers develop from unfertilized eggs. Therefore, the female cloned themselves, ensuring the existence of the species. It is interesting that some female representatives behave as males imitating their behavior and mating with other females. But why such a throwback to this species, scientists do not yet know.
4. genitals dandelion
At dandelion, like other plants, have genitals. However, the flower prefers asexual reproduction, that is, the growing season. Anyone who watched the spring quickly covered the entire field of these yellow flowers, willingly believe. After cloning a lot easier and faster. Nevertheless, the dandelion has a non-functional stigma, stamens and pistils.
5. Wisdom teeth in humans
About wisdom teeth man often remembered for two reasons. First - painfully erupt. Second - do not cut through, grow properly in the jaw, and the orthodontist has to tinker, cutting them. Why do they do? Does nature has provided dentists and take care of their earnings? Obviously, these teeth we have inherited from our ancestors.
They had a big jaw, and no problems with the additional four teeth did not occur. Another version (apparently, a supporter of the theory of the feasibility of the whole of nature), when at the age of 18 years, people have not lost one tooth. There was no tooth powders, pastes, Dental clinic. Therefore, the teeth appearing last, have all chances to really help the owner to chew food.
6. eyes fish astyanaks Mexican
Nature conducted an interesting experiment on the fish living in the deep ocean off the coast of Mexico. The fact that, despite the presence of the eye, it is completely blind. The body of another begins to degenerate in the embryonic period, and the fish is born blind. Her eyes are closed non-functional skin. But her cousin, who lives on the surface of the water column, is quite full eyes.
The researchers carried out experiments by grafting the lens of a blind sighted species. As a result of blind individuals we were beginning to see. The skin flap 8 days started to develop a normal eye - with full pupil and cornea. A month later, the fish begin to see. Therefore blind eye astyanaksa - throwback connected with the living conditions at a depth where there is no light.
7. The coccyx in man
Several vertebrae fused together, are other mammals tail that man is not needed. In the evolution of the man proceeded to walk upright, so this organ of equilibrium as the tail was for him superfluous. But still sometimes born tailed kids.
This throwback plastic surgeons removed without any complications and losses for the body. While some doctors believe that the tailbone is needed as a support of the pelvic organs. In the Middle Ages all tailed kids together with their mummies simply exterminated, accusing women of witchcraft, and an evil spirit.
8. Muscle-lift and hair on the body
Muscle-lift hair and wool performs important functions in animals. To scare off the intruder, it is necessary only to strain the smooth muscle - and hair stood on end. Man is this muscle "gives" goosebumps. The hair on the body except the head, where they are protected from the sun, and eyebrows that trap perspiration that does not drip into the eyes, lost its function.
9. HINDQUARTERS whales
100 million. Years ago, the only vertebrates on the planet were a fish, amphibians and aquatic mammals. Land they had just mastered. As an adaptation to survival out of the water they developed limbs. However, some mammals had to return to the original environment of existence. This was 50 million. Years ago. These animals were the ancestors of modern whales. Reminder of terrestrial life ancestral whales remained in the form of rudimentary feet.
10. The wings of birds that do not fly
In 1798, 60 years before the first book of Charles Darwin, the French anatomist Geoffrey Eten (É'ienne Geoffroy) during a trip to Egypt with Napoleon described the birds can not fly. However, they had wings. It dealt with the ostrich, but the scientist erroneously called them cassowary.
Like ostriches, cassowaries and from there anatomically complete wings, but non-functional. The same wings have a kiwi and kakapo parrots (the only species of parrots that can not fly). Why do they need it? They use their wings for balance, planning and maneuvering while running.
Source:
Appendix 1. a person
In the appendix of herbivores large in size, and its main function - to help in the digestion of food of vegetable origin. In humans a long time, the role of this small part of the large intestine remained unclear, because the value of the appendix in the digestion is quite small.
According to biologists and paleontologists believe this process was a legacy from our ancestors, eat mainly foods of plant origin.
Recent scientific studies indicate that the appendix plays the role of the immune defense, because it contains a significant amount of lymphoid tissue. Atavism or not, but the appendix is often reminiscent of its existence: thousands of transactions each year, and hundreds of deaths.
(10 ph + text)
2. The breast and nipple in men
The feasibility of the mammary glands in men and is still in question. Some people speculate on this, they say, does not indicate whether it is that not one of Adam's rib Eve was created, and vice versa? Scientists also explain the similarity of the anatomical structure of the body so that the early stages of embryogenesis fruit male and female flows equally.
Only then included the mechanisms that determine the presence and severity of secondary sexual characteristics. By the way, breast cancer suffer not only women, but also the stronger sex. In addition, some men have sometimes appears milk. This may indicate serious diseases neuroendocrine nature.
3. Males have hlistohvostyh lizards
This type of male lizards do without. Toddlers develop from unfertilized eggs. Therefore, the female cloned themselves, ensuring the existence of the species. It is interesting that some female representatives behave as males imitating their behavior and mating with other females. But why such a throwback to this species, scientists do not yet know.
4. genitals dandelion
At dandelion, like other plants, have genitals. However, the flower prefers asexual reproduction, that is, the growing season. Anyone who watched the spring quickly covered the entire field of these yellow flowers, willingly believe. After cloning a lot easier and faster. Nevertheless, the dandelion has a non-functional stigma, stamens and pistils.
5. Wisdom teeth in humans
About wisdom teeth man often remembered for two reasons. First - painfully erupt. Second - do not cut through, grow properly in the jaw, and the orthodontist has to tinker, cutting them. Why do they do? Does nature has provided dentists and take care of their earnings? Obviously, these teeth we have inherited from our ancestors.
They had a big jaw, and no problems with the additional four teeth did not occur. Another version (apparently, a supporter of the theory of the feasibility of the whole of nature), when at the age of 18 years, people have not lost one tooth. There was no tooth powders, pastes, Dental clinic. Therefore, the teeth appearing last, have all chances to really help the owner to chew food.
6. eyes fish astyanaks Mexican
Nature conducted an interesting experiment on the fish living in the deep ocean off the coast of Mexico. The fact that, despite the presence of the eye, it is completely blind. The body of another begins to degenerate in the embryonic period, and the fish is born blind. Her eyes are closed non-functional skin. But her cousin, who lives on the surface of the water column, is quite full eyes.
The researchers carried out experiments by grafting the lens of a blind sighted species. As a result of blind individuals we were beginning to see. The skin flap 8 days started to develop a normal eye - with full pupil and cornea. A month later, the fish begin to see. Therefore blind eye astyanaksa - throwback connected with the living conditions at a depth where there is no light.
7. The coccyx in man
Several vertebrae fused together, are other mammals tail that man is not needed. In the evolution of the man proceeded to walk upright, so this organ of equilibrium as the tail was for him superfluous. But still sometimes born tailed kids.
This throwback plastic surgeons removed without any complications and losses for the body. While some doctors believe that the tailbone is needed as a support of the pelvic organs. In the Middle Ages all tailed kids together with their mummies simply exterminated, accusing women of witchcraft, and an evil spirit.
8. Muscle-lift and hair on the body
Muscle-lift hair and wool performs important functions in animals. To scare off the intruder, it is necessary only to strain the smooth muscle - and hair stood on end. Man is this muscle "gives" goosebumps. The hair on the body except the head, where they are protected from the sun, and eyebrows that trap perspiration that does not drip into the eyes, lost its function.
9. HINDQUARTERS whales
100 million. Years ago, the only vertebrates on the planet were a fish, amphibians and aquatic mammals. Land they had just mastered. As an adaptation to survival out of the water they developed limbs. However, some mammals had to return to the original environment of existence. This was 50 million. Years ago. These animals were the ancestors of modern whales. Reminder of terrestrial life ancestral whales remained in the form of rudimentary feet.
10. The wings of birds that do not fly
In 1798, 60 years before the first book of Charles Darwin, the French anatomist Geoffrey Eten (É'ienne Geoffroy) during a trip to Egypt with Napoleon described the birds can not fly. However, they had wings. It dealt with the ostrich, but the scientist erroneously called them cassowary.
Like ostriches, cassowaries and from there anatomically complete wings, but non-functional. The same wings have a kiwi and kakapo parrots (the only species of parrots that can not fly). Why do they need it? They use their wings for balance, planning and maneuvering while running.
Source: