7 features that native people with reptiles Bashny.Net

Know your inner yascheritsu



It may, at first glance it quietly, but in each of us sitting "inner lizard", and we have the features that prove it. For example:

1. The yolk meshok



While we were still in the womb as an embryo, we have a relic of our past egg-laying - the yolk sac. This bag, as well as eggs of reptiles and birds, embryos provides all necessary nutrients. The yolk sac appeared about 300 million years ago, when the land came first amphibians. He prevented the eggs dry out with the amniotic cavity.

2. Flexible kozha



Our skin has been seen as reptiles. About 300 million years ago, reptiles evolved a new type of skin, so that they can deal with the dry air on the ground - the top layer of the skin has become a waterproof barrier of dead cells and lurk beneath moist living cells. We inherited them from the system.

3. Volosy



Reptiles and mammals was furnished here - to grow your hair first. For example, thrinaxodon (reptiles, shrews, who lived about 245 million five years ago), there were special whiskers to feel better in the dark items. Over 20 million years, the animals were becoming hairier and hairier until the first mammals.

4. Ears and sluh



The three bones in the middle ear help us hear better. Surprisingly, the two are the same bones of the skull are reptiles. The fossil record indicates that more than 200 million years ago, two jaw bones gradually began to "grow" into the heads of the ancient reptiles. Small myshepodobnye hadrokodiumy being descended from reptiles about 190 million years ago, was perhaps the first creatures to inherit from Reptile ear with three bones.

5. Big mozg



When later reptiles and early mammals were sensitive whiskers and sensitive hearing, their brains had to process more information. Because of this, the brain began to grow.

6. Zuby



Most modern reptiles long, sharp and conical teeth. Well, like crocodiles. Canines do not have - it is the prerogative of mammals. But it was not always. Like dogs gorgonopsia Raptor was one of the first ancient reptiles, started to flaunt long fangs. By the time 230 million years ago were similar to triheldonty shrews, reptiles already being fed on plants using teeth-molars.

7. The genes that make us nami



Of course, we have not inherited the skin, bones and teeth directly from reptiles. We just adopted the genes that made possible the emergence of all this. For all these transformations corresponds to a single gene - EDA: it controls how much we have teeth, hair, and what our skin. It is believed that mutations in the ancient reptiles EDA helped us to inherit these qualities in our body.

via factroom.ru