Sternum of Mammal (With Diagram) | Vertebrates | Chordata | Zoology
The sternum is an elongated structure in the midvental region of the thorax. It is absent in fishes but occurs in tetrapoda. Some tetrapoda such as Proteus, Amphiuma, caecilians, snakes, turtles and limbless lizards have no sternum. Primitively the sternum is a plate of cartilage, but in later forms it has a series of cartilages or bones or both. In [...]