describe double circulation of blood in human being? why is it necessary?and from where it starts and finish?
Answers
Answer:
During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature.
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Answer:
The heart receives deoxygenated blood from different parts of the body, and it pumps this blood to the lungs. The oxygenated blood from the lungs returns to the heart, which is pumped again into different parts of the body by the heart. Thus, the blood passes twice through the heart making one complete round through the body. This is called double circulation.
First the blood from body parts goes to heart and then for lungs to get oxygenated and the from there moves through the heart to all the body parts
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