What is called incomplete double circulation?

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(A) Incomplete double circulation is a type of circulatory system found in amphibians and most reptiles (except crocodiles).In these organisms,the hea

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$A$ system where blood flows through the heart twice in one cycle but mixes in the ventricle.

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(A) Incomplete double circulation is a type of circulatory system found in amphibians and most reptiles (except crocodiles).In these organisms,the heart consists of three chambers: two atria and one ventricle.The left atrium receives oxygenated blood from the respiratory organs (gills,lungs,or skin),while the right atrium receives deoxygenated blood from the rest of the body.Since there is only one ventricle,the oxygenated and deoxygenated blood mix within it before being pumped out to the body.This mixing of blood is why it is termed 'incomplete' double circulation.

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