Question

5) Differentiate between pre caval and post caval vein?​

Answer 1

Answer:

The postcaval vein, present in terrestrial vertebrates, is a late acquisition, both in evolution and in embryogenesis; it is a result of the intercommunication of several venous channels, including the anterior portion of the vitelline veins.

Answer 2

Answer:

precaval vein (superior venacava) postcaval vein(inferior venacava)

precaval vein takes the deoxygenated blood from the upper side of the heart

and other one from the down side of the heart