Question

explain double circulation in human beings

Answer 1

in our body the two types of blood which is pure and impure blood is not mix in any part of the body and in heart it is separated by a wall .This separation called double circulation

Answer 2

During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human beings to seperate oxygenated and deoxygenated blood because this makes their circulatory system more efficient and helps in maintaining constant body temperature