It is believed that therapsids already had homeothermic mechanisms, although that is something that can not be easily verified, only by seeing bones. The therapsids became dominant at some point in evolution; they were reptiles that did not drag their bellies (so the term reptile would not be adequate) and they show signs of having hairs on the skin.
Wednesday, January 30, 2019
covers the skin
Keratin is a very resistant protein that covers the skin of all vertebrates, and also forms its structures: hairs, nails, feathers, beaks, hooves, horns, claws. According to paleontologists, hairs appeared for the first time even before dinosaurs, in a group of reptiles called therapsids (primitive reptiles from which mammals descend Princess Hair).
It is believed that therapsids already had homeothermic mechanisms, although that is something that can not be easily verified, only by seeing bones. The therapsids became dominant at some point in evolution; they were reptiles that did not drag their bellies (so the term reptile would not be adequate) and they show signs of having hairs on the skin.
It is believed that therapsids already had homeothermic mechanisms, although that is something that can not be easily verified, only by seeing bones. The therapsids became dominant at some point in evolution; they were reptiles that did not drag their bellies (so the term reptile would not be adequate) and they show signs of having hairs on the skin.
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