name the structures which are present in veins and lymph ducts and absent in arteries
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Structures called valves are present in veins and lymph ducts but are absent in arteries. These valves mainly prevent the backflow of blood in the vessels.
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Answer:
Structures called valves are present in veins and lymph ducts but are absent in arteries. These valves mainly prevent the backflow of blood in the vessels.
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