question_answer 51)

  Answer the following (a) name the major site where RBCs are formed. (b) which part of heart is responsible for initiating and maintaining its rhythmic activity? (c) what is specific in the heart of crocodiles among reptilians?

Answer:

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