Q. Which of the following blood vessels is the largest in earthworm and possess valves?
A) Dorsal blood vessel
B) Sub-neural blood vessel
C) Ventral blood vessel
D) Supra oesophageal blood vessels
Explanation
In dorsal blood vessel, blood flows from behind to forward by the rhythmic contraction and they also possess valves, which prevent the backward flow of blood.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.