Question

Flow of blood in dorsal blood vessel of Earthworm is in .......... direction.

• A. Backward
• B. Forward
• C. Sideward
• D. Downward

Answer 1

The correct option is B Forward

Blood flows toward the anterior end of the earthworm in the dorsal vessel. From the dorsal vessel, it enters the heart (aortic arches), which pump it into the ventral vessel. Blood flows posteriorly in the ventral vessel. Small tubes connect the dorsal and ventral vessels throughout the earthworm.

So, the correct answer is option B.