(D) In $Pheretima$,the dorsal vessel acts as a distributing vessel in the anterior region (first $13$ segments) to supply blood to the body parts.In t

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Distributing vessel in first thirteen segments & collecting vessel in intestinal region

(D) In $Pheretima$,the dorsal vessel acts as a distributing vessel in the anterior region (first $13$ segments) to supply blood to the body parts.In the intestinal region (behind the $13^{th}$ segment),it acts as a collecting vessel,receiving blood laden with digested nutrients and ${O_2}$ from the body wall and gut.

Class 11 Biology Structural Organisation in Animals Anatomy of Earthworm

Medium

Regarding blood circulation,it may be said that in $Pheretima$,the dorsal vessel is a:

A
Collecting vessel in first two segments and distributing vessel in other
B
Distributing vessel in first five segments and collecting vessel in other
C
Collecting vessel in first thirteen segments & distributing vessel in intestinal region
D
Distributing vessel in first thirteen segments & collecting vessel in intestinal region