Do you have any organs that you do not use? Scientists believe that there is. According to the theory of Charles Darwin, some “unnecessary parts of the body” show our connection with the ancestors, and perhaps someday fall off like the tail of a lizard. Here are the top-10 “errors of nature.”
1. Appendix humans
In herbivores, the appendix is larger and its main function – assistance in the digestion of food of plant origin. In humans, long-term role of this small part of the colon remains unclear, since the value of the appendix in digestion insignificant.
According to the biologists and paleontologists, this appendage was left to us by our ancestors, eat mainly foods of plant origin.
Recent scientific studies indicate that the appendix plays a role of immune protection, because it contains a significant amount of lymphoid tissue. Atavism or not, but the appendix is often reminded of its existence thousands of transactions each year, hundreds of deaths.
2. Breast and nipples in men
Feasibility of mammary glands in men and still remains in question. Some are speculating on this, they say, does not indicate whether it is that is not from Adam’s rib was created Eve, and vice versa? Scientists also explain the similarity of the anatomical structure of the body so that at the early stages of embryogenesis the fruits of male and female look the same.
Only then include mechanisms that determine the presence and severity of secondary sexual characteristics. By the way, breast cancer suffer from not only women but also the stronger sex. In addition, some men may sometimes be a milk. This may indicate a serious disease of neuroendocrine nature.
3. Males have hlistohvostyh lizards
This kind of lizards do without males. Babies develop from unfertilized eggs. Therefore females clone themselves, ensuring the existence of the species. It is interesting that some representatives of female manifest themselves as males, copying their behavior and pairing with other females. But why such a throwback to this species, scientists do not yet know.
4. The sex organs of dandelion
In dandelion, like other plants, there are sexual organs. However, this flower prefers asexual reproduction, ie growing season. Anyone who watched the spring of the whole field is covered rapidly by these yellow flowers, readily believe. After clone ourselves much more convenient and faster. Nonetheless, the dandelion is a non-functional stigmas, stamens and pistil.
5. Wisdom teeth in humans
About wisdom teeth of a man often recalls for two reasons. First – painfully erupt. Second – not erupt incorrectly grow into the jaw and the orthodontist have trouble by cutting them. Why do they do? Surely nature has provided dental care and took care of their earnings? Obviously, these teeth we have inherited from our ancestors.
They also had a big jaw, and no problems with the additional four teeth have been encountered. Another version (apparently supporters of the theory of the feasibility of all in nature): as early as the age of 18 years, people have lost not one tooth. There was no tooth powders, pastes, stomatklinik. Therefore, the teeth that appeared recently, had every chance to really help the owner chew food.
6. The eyes of fishes astyanaks Mexican
Nature conducted an interesting experiment on fish living in the depths of the ocean off the coast of Mexico. The fact is that despite the presence of eyes, she was completely blind. Eyesight begins to deteriorate further in the embryonic period, and the fish is born blind. Her non-functional eyes closed skin. But her cousin, who lives on the surface of the water column is completely full eyes.
Scientists conducted experiments, to take the lens of the kind of blind sighted. As a result of blind individuals began to see. In skin flap after 8 days started to develop normal eyes – with the full pupil and cornea. A month later began to see fish. Therefore blind eye astyanaksa – atavism associated with living conditions at depths where no light.
7. Hawk man
Several interlocking between the vertebrae themselves, serve other mammals tail, which one does not need. In the evolution of man came to upright posture, so that body balance as the tail was for him superfluous. But still sometimes babies are born tailed.
This throwback to plastic surgeons removed without any complications and losses for the organism. While some doctors believe that the tailbone needed as a support the pelvic organs. In medieval times all caudate kids with their mums simply exterminated by accusing women of witchcraft, and with evil force.
8. Muscle-lift hair and body hair
Muscle-lift hair and wool performs important functions in animals. To scare off intruder need only exert these smooth muscle – and the hair stood on end. Man is this muscle “gives” goose skin. The hair on the body except the head, where they protect from the sun, and eyebrows, which retard the sweat that dripped into the eyes not to have lost its function.
9. Hind limbs in whales
100 million years ago, the only vertebrates on the planet were fish, amphibians and aquatic mammals. Land they have just mastered. As an adaptation to living out of the water they have evolved their limbs. However, some mammals had to return on Wednesday’s initial existence. It happened 50 million years ago. These animals were the ancestors of modern whales. Reminder land-based way of life of ancestors stayed with the whales in the form of rudimentary legs.
10. The wings of birds that do not fly
In 1798, for 60 years before the first book of Charles Darwin, French anatomist Geoffroy Eten while traveling with Napoleon in Egypt described the birds that can not fly. However, they had wings. Talked about ostriches, but the scientist mistakenly called them cassowary.
Like ostriches, and cassowaries are anatomically have full wings, but non-functional. Similar wings are kiwi and kakapo parrots (the only species of parrots that do not fly). Why do they need? Their wings they use for balance, planning and maneuvering when running