what is double circulation ? how it is useful ?
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Double circulation helps to keep oxygenated and deoxygenated blood from mixing. Such separation allows a highly efficient supply of oxygen to the body.
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The circulation of blood from heart to body cells by arteries and the circulation of blood from blood cells to heart by veins are carried two times. that's why it is called double circulation. mammals have four chambrers to maintain body temperature as they need more
energy.
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energy.
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