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explain double circulation with a diagram or video ... urgently plzz:)

@Hardik- your friends have given the right answer.

@Others-good job guys. keep posting.

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The blood passes to aorta from the left ventricle. The aorta gives rise to many arteries that distribute the oxygenated blood to all the regions of the body.

Schematic diagram of blood circulation in humans

Therefore, the blood goes twice through the heart. This is known as double circulation.

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You might be familiar with the circulation of blood. Now look at this image, this image is a schematic representation of blood circulation.
Here you can observe that the blood passes through the heart twice. Since the blood goes twice through the heart, it is known as double circulation. Warm-blooded animals like mammals have this type of blood circulation.
 
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The blood passes through the heart twice in order to complete a cycle. Thus the process is called double circulation.

Schematic diagram of blood circulation in humans : -

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