Question

In Earthworm, dorsal blood vessel is collecting channel

• A. Behind 13th segment
• B. Anterior 13 segment
• C. Throughout
• D. In typhlosolar region

Answer 1

The correct option is A Behind 13th segment

In the first thirteen segments, the dorsal vessel acts as a distri­buting vessel and extends up to the cerebral ganglion. It runs along the mid-dorsal line of the body and just above the alimentary canal, there are few longitudinal vessels acting as collecting or distributing vessels which are connected with one anoth­er by some transverse vessels acting as the heart.

So the correct answer is 'Behind 13th segment'.