describe the double circulation of humans beings.
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The blood circulatory system in humans is an example of double circulation. It means that blood goes through the heart twice to supply blood once around the body.
It involves, pulmonary circulation, i.e movement of blood from heart to the lungs and back.
Systemic circulation is circulation of blood from heart to different parts of the body except lungs and back.
It is a closed circulatory system, i.e. blood travels around body inside the blood vessels.
Here is your answer
===================
The blood circulatory system in humans is an example of double circulation. It means that blood goes through the heart twice to supply blood once around the body.
It involves, pulmonary circulation, i.e movement of blood from heart to the lungs and back.
Systemic circulation is circulation of blood from heart to different parts of the body except lungs and back.
It is a closed circulatory system, i.e. blood travels around body inside the blood vessels.
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During a single cycle blood goes twice in the heart which is known as double circulation. it is necessary in human being deoxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature
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