Give reason have four chambered heart is helpful for humans
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The presence of four chambered heart in humans stand as an advantage. This is because this set up prevents the intermixing of pure and impure blood....
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In a four chambered heart there is complete separation in oxygenated and deoxygenated blood. While in 3 or 2 chambered one the blood could mix ,dilluting the oxygen in the oxygenated blood.
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