Question

which region of earthworm has valves?​

Answer 1

Answer:

Dorsal blood vessel- It is the largest vessel in the body extending along the mid dorsal line above the gut. This vessel is muscular, valvular and contractile. In this blood vessel, the blood flows from posterior end to the anterior end. Immediately in front of each septum this vessel has a pair of valves in its lumen.

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Answer 2

Explanation:

It is contractile and rhythmically operates to force the blood from the posterior to the anterior side. It has a pair of valves internally in each segment which check the backward flow of blood. Dorsal blood vessel is regarded as true heart in earthworm.