...drew attention to a formerly underappreciated part of early tetrapod anatomy: the inside of the lower jaw. Fish generally have ...movement of the head separate from the body. The gill system also underwent substantial renovation, losing some bones but increasing ...air-filled sac in the throat region, making the entire respiratory apparatus better suited to breathing air." " ...

... drew attention to a formerly underappreciated part of early tetrapod anatomy: the inside of the lower jaw. Fish generally have two... movement of the head separate from the body. The gill system also underwent substantial renovation, losing some bones but increasing the ... air-filled sac in the throat region, making the entire respiratory apparatus better suited to breathing air." " What were ...