How is the circulatory system of reptiles characterized? What is the basic difference among the reptile and the amphibian heart?

The circulatory system of beings of the class Reptilia is same to the amphibian, closed and incomplete. Although the heart presents three chambers (two atria and one ventricle) in reptiles there is a starting of ventricular septation and the mixture of arterial with venous blood is lessened.

 

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