Q. Which one is absent in frog?
A) Phrenic nerve
B) Renal portal vein
C) Both (a) and (b)
D) None of these
Explanation
Three slender branches one each from the ventral rami of third, fourth and fifth cervical nerves on each side constitute a phrenic nerve to innervate the diaphragm (diaphragm is absent in frog).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.