The flow of blood in the dorsal blood vessel of earthworm is

Backwards

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Forwards

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Backwards in half and forward in other half

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None of the above

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Solution

The correct option is B Forwards
The dorsal blood vessel of an earthworm is the largest and the most prominent, which rises along the mid-dorsal line above the alimentary canal and extends throughout the length of the body. The walls of this blood vessel are thick and muscular. The flow of the blood is posteroanterior or forward. So, the correct answer is option B.

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