Amphibians|Reptilia|Aves|Mammals

Classification|Cyclostomata|Pisces|Amphibians|Reptilia|Aves|Mammalia

Amphibia|| Reptilia

Amphibian || Reptilia

Amphibians are

Evolution OF Heart (Heart OF Fishes/ Amphibian/Reptilian/Birds/Mammals) || Human Heart- introduction and external structure.

Class Reptilia

Class Reptilia

Aves || Mammalia

Discussion Class-4 Class Amphibia || Reptilia || Aves(birds)|| Mammalia