Name the structures which are present in veins and lymph ducts and absent arteries.
SCERT Telangana Class 10 Biology Respiration
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Valves prevent the back flow of blood, thus forcing blood to move in one direction only. Valves are present in veins and lymph ducts but not arteries. This is because arteries contain a higher blood pressure than veins and lymph ducts due to the pumping action of the heart, and thus do not require valves.
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valves
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