Question

what is double circulation in human being? why it is necessary?

Answer 1

Double circulation is flow of blood from the hear to the organs and back to the heart in one circulation. It is necessary as it helps in maintaining efficiency and maintaining body temperature.

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Answer 2

Answer:Double circulation helps to keep oxygenated and deoxygenated blood from mixing. Such separation allows a highly efficient supply of oxygen to the body. This is useful in animals that have high energy needs, such as humans (as well as birds and other mammals), which constantly use energy to maintain their body temperature.

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