Animal Phylum of the world
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Porifera
Cnidaria
Platyhelminthes
Rotifera
Nematoda
Mollusca
Annelida
Arthropoda
Echinodermata
Chordata
Amphibians
Mammals
Birds
Reptiles
Amphibians reproduces sexually
When Amphibians are in the juvenile stage and they are a tadpole they have gills and a two chambered heart.As they get older they lose their gills and grow a pair of lungs and a three-Chambered heart
Home
About
Porifera
Cnidaria
Platyhelminthes
Rotifera
Nematoda
Mollusca
Annelida
Arthropoda
Echinodermata
Chordata
Amphibians
Mammals
Birds
Reptiles