Why is it necessary to separate the left and right side of heart in mammals?
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to avoid the mixing of oxygen rich blood and carbon dioxide rich blood
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Birds (some dinosaurs) and mammals have a four-chambered heart.
The ventricle is divided by a septum into two compartments completely separating oxygenated from deoxygenated blood and delivering the maximum amount of oxygen to the head and body at the most efficient pressure.
The four-chambered heart solves the dilution problem.
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