The function of blood gland in earthworm is ____________________.

To produce blood cells and haemoglobin which is dissolved in blood plasma

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To product blood cells dissolved in blood plasma and haemeglobin

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To produce only phagocytic cells

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To produce blood vessels

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Solution

The correct option is A To produce blood cells and haemoglobin which is dissolved in blood plasma
The correct answer is A.
Earthworm exhibits a closed type of blood vascular system, consisting of blood vessels, capillaries and heart. Due to closed circulatory system, blood is confined the heart and blood vessels. Contraction keep blood circulating in one direction. Smaller blood vessels supply the gut, nerve cord, and the body wall. Blood glands are present on the 4th, 5th, 6th segments. They produce blood cells and haemoglobin which is dissolved in blood plasma.

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