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Which of the following statements is inc...

Which of the following statements is incorrect about the circulatory system of earthworm?

A

Pheretima represents a closed type of blood vascular system.

B

Blood glands are present in 4th, 5th, and 6th segments, they produce blood cells and hemoglobin dissolved in plasma.

C

There are four pairs of hearts in earthworm present in 7th, 9th, 12th, and 13th segments.

D

ln the dorsal vessel, blood flows in forward direction and is without valves.

Text Solution

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The correct Answer is:
D
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