Freshwater crocodile the same weight. This allows them to live for a half a year without eating. After the food goes down the throat, it is met in the gizzard by sand and rocks -these elements help break apart the bones, horns, hooves, hide, and flesh. This more broken-down material then enters the hydrochloric acid of the stomach. The hearts of other reptiles are designed to contain three sections including two atriums and ventricle. The right atrium, which collects the returned de-oxygenated blood and the left atrium which collects the oxygenated blood collected from pulmonary arteries of the lung, takes the blood
Stomach the first three chambers of which are all lined with oesophageal mucosa. In birds and crocodilians, the stomach is divided into two regions. Anteriorly is a narrow tubular region, the proventriculus, lined by fundic glands, and connecting the true stomach to the crop. Beyond lies the powerful muscular gizzard, lined by pyloric glands, and, in some species, containing stones that the animal swallows to help grind up food. In insects there is also a crop. The insect stomach is called the midgut. Information about the stomach in echinoderms or molluscs can be found under the respective articles. Stomach The stomach