Q. 124.0( 2 Votes )

How is double circulation different from single circulation?

Answer :

In the single circulation, the deoxygenated blood from the whole body of the animal flows into the heart. From the heart, it is pumped to the gills and from there, the oxygenated blood is pumped back into the body. This kind of circulation takes place in fishes.

Whereas in double circulation, the deoxygenated blood is collected from the body in the heart. It is then pumped towards the lungs for the process of oxygenation and this oxygenated blood comes back to the heart. The heart pumps back this oxygenated blood towards the body tissues. In this type of circulation, as the blood passes through the heart two times; hence, it is known as double circulation. It takes place in birds & mammals like human beings.

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