As amphibians evolved into increasingly complex organisms, there arose a need for a three chambered heart. What advantages are afforded by such a structure?

TheAlphaWolf

oxygen rich blood does not mix with oxygen depleated blood, thus providing the organism with more energy (since the depleated blood goes to the lungs and not to the rest of the body) and so the organism can run more etc. May 01 04, 7:44 PM

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