Why do humans need 4 chambers in their hearts? Why can't we have only 2 or 3 chambers?
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we need four chambers so as to seperate the oxgenated and deoxgenated blood of our body and also humans are warm blooded animals so they need pure oxgenated blood to maintain the temperature of the body. so due to this we need lot of oxgenated blood for many purpose and even we have to remove the co2 which is harmful for or body.
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