1. Tardigrade
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  4. Which of the following is the character of dorsal blood vessel of the earthworm?

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Q. Which of the following is the character of dorsal blood vessel of the earthworm?

Punjab PMETPunjab PMET 2007

Solution:

Dorsal blood vessel distributes in the first 13 segment. The blood in these vessel flow from behind to forward by rhythmic contraction and also posses valves.