Question

describe double circulation

Answer 1

Hey. mate here's your answer

double circulation is the circulation of blood twice to heart to complete single circulation

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Answer 2

Double Circulation=> 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.