Question

define double circulation​

Answer 1

The heart is the key organ for blood circulation and the double circulation is an efficient way of circulation as it provides an effective way of circulation. The main difference is that the blood follows two routes – one for oxygenated blood and the other for deoxygenated blood. Hence the name “double circulation.” The majority of mammals, including humans utilize double circulatory system.

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Answer 2

Answer:

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