Name the structures which are present in veins and lymph ducts and absent in arteries
Answers
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. Due to the high pressure of blood flowing n the arteries, they do not require valves to prevent backflow of the blood. As the blood pressure is low in veins and lymph pressure is low in the lymph ducts they require valves.
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Answer:
Explanation
Valves are present in veins and lymph ducts but not in arteries. The main function of the valves is to prevent the backflow of blood and lymph in veins and lymph nodes. But in the case of arteries, it doesn't require any valves due to the high pressure of blood flowing through arteries. Since the blood pressure is lower in the case of veins and lymph ducts they require valves.
Final Answer
The function of the valves is to prevent the backflow of blood into the veins and lymph ducts. Most of the veins have a one-way valve and each consists of 2 flaps (cusps or leaflets).