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

How is the circulatory system of reptiles characterized? What is the basic difference between the reptile and the amphibian heart?
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The circulatory system of beings of the class Reptilia is similar to the amphibian, closed and incomplete. Although the heart presents three chambers (two atria and one ventricle) in reptiles there is a beginning of ventricular septation and the mixture of arterial with venous blood is lessened. Image Diversity: reptilian heart
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