the amphibians have a three chambered heart whilst the fish have a two chambered heart.
Humans give birth to live young, but fish are oviparous (egg-laying).
their circulatory system is tottaly different from each other as fishes have sinple circulatory system and consists of single auricle and ventricle while all amphibians have double circulatory system and have 3 chambers of heart (one ventricle and two atrium).
Amphibians have closed circulatory system Closed
No. Reptiles and amphibians are two different orders and animals and amphibians cam first. Simply put, the first amphibians evolved from fish and the first reptiles evolved from amphibians.
Fish are fish, their own group. Frogs are amphibians though.
no they have double loop circulatory system but the difference is that they have single ventricle.
Fish, and then amphibians, and then reptiles, and then mammals
pulmonary veins
No. Clownfish are fish. Amphibians include frogs, salamanders and caecilians.
Fish, reptiles, and amphibians, originated in that order during the Paleozoic era.
I suggest you get a copy of Homer Smith's book: From Fish to Philosopher. Start with fish; they don't need a separate pulmonary system (they have gills), to amphibians who have a 3 chambered heart, up to mammals and birds who require essentially two completely separate systems for pulmonary and systemic circulation.
Fish have closed-loop circulatory systems.