Do all hearts have 4 chambers?



  1. 0 Votes

    All mammals have a four-chambered heart, but not every animal does. Amphibians and reptiles have only three chambers, and some fish have a four-chambered heart that is very different from that of humans or other mammals.

  2. 0 Votes

    No, hearts vary throughout the animal kingdom. All mammals and birds have a four chambered heart, as do crocodiles. The four chambers consist of two atria and two ventricles. The rest of the reptile population and all amphibians have a three chambered heart, two atria and a ventricle. Fish only have two chambers, one atria and one ventricle.

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