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Yes, mammals have a 4chambered heart, while reptiles only have a 3chambered heart.
Amphibians have a three chambered heart.
the amphibians have a three chambered heart whilst the fish have a two chambered heart.
Yes, an amphibian does have a heart.
the heart is two chambered.
Crocodiles are reptiles not amphibians.
Amphibians have a three chambered heart, two atria and a single ventricle. Fish only have a two chambered heart and mammals have a four chambered heart.
Amphibians.
shark/pisces
bigger than a human
No.
Reptiles and amphibians have a rather similar heart if not the same, they both have 2 atria and one ventricle combining to three chambers in their hearts.