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Two atria and one ventricle make up the three-chambered heart of a snake. The right and left atria receive blood from the lungs and body, respectively, and pass it to the ventricle to be circulated again. Encased in a sac, called the pericardium, the heart is located at the branching of the bronchi.
The three chambered amphibian heart consists of the right and left atria and a single ventricle. One can say that the reptile heart has three chambers, two atria and one, partially divided, ventricle.Or one may argue that reptiles have four-chambered hearts with two atria and two ventricles, but the wall between the ventricles is incomplete. In fact, both of these interpretations are correct.he three chambered amphibian heart consists of the right and left atria and a single ventricle. One can say that the reptile heart has three chambers, two atria and one, partially divided, ventricle.