mammals and birds have four chambered heart ..why??
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Mammals and birds have four chambered heart as they have high energy needs in order to maintain their body temperature. Seperation of the chambers prevents the mixing of the oxygenated and deoxygenated blood which allows a high efficient supply of oxygen to the body.
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In mammals and birds, the heart is divided into four chambers :two atria and two ventricles the oxygenated blood is separated from the deoxygenated blood ,which improves the efficiency of double circulation and is probably required for a warm blooded Lifestyle of mammals and birds . The four chambered heart of birds and mammals evolved independently from a three chambered heart.
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