ICSE Class 9 - Division of Phylum Chordata Videos

Reptiles breathe in much the same way as humans do, inhaling and exhaling through their lungs. 

Adaptations in Aves include streamlined body, hollow skeleton and lightweight beak. 

Cold-blooded animals cannot maintain their body temperature. 

Koala is a marsupial; it has a pouch in which to carry her young one.