Answere the following
name the major site where RBCs are formed
which part of heart is responsible fpr initating and maintaining its rhythmic activity ?

Solution: (a) Bone marrow
( b) SA Node (Sino Atrial Node)
Reptile have 3 chamberred heart with an exception of crocodile which possess 4 chambered heart,due to the partial division of ventricle through a septum.