Which of the following is absent in the circu | vedclass

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(D) The circulatory system of an earthworm $(Pheretima)$ is of the closed type,meaning blood is confined to blood vessels and capillaries. Earthworms

Vedclass · Accepted Answer

Haemolymph

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(D) The circulatory system of an earthworm $(Pheretima)$ is of the closed type,meaning blood is confined to blood vessels and capillaries. Earthworms possess hearts (lateral hearts) to pump blood. However,earthworms do not have haemolymph; instead,they have red blood containing haemoglobin dissolved in the plasma. Haemolymph is a characteristic fluid found in the open circulatory system of arthropods and some molluscs,not in annelids like earthworms.

Which of the following is absent in the circulatory system of an earthworm?

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