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Questions and Answers
Which of the following is a characteristic of lymph collecting vessels?
Which of the following is a characteristic of lymph collecting vessels?
- They are smaller than lymph capillaries
- They are responsible for the movement of lymph towards the heart
- They empty into lymph nodes via efferent lymph vessels
- They have valves and appear similar to lymph capillaries (correct)
What is the role of valves in lymph collecting vessels?
What is the role of valves in lymph collecting vessels?
- To determine the direction of lymph flow (correct)
- To form a beaded appearance in the lymph ducts
- To compress the lymph vessels
- To empty lymph into lymph nodes
What is the function of smooth muscle cells in the walls of lymph ducts?
What is the function of smooth muscle cells in the walls of lymph ducts?
- To form valves
- To give a beaded appearance to the lymph ducts
- To contribute to the movement of lymph towards the heart (correct)
- To compress the lymph ducts
What causes the movement of lymph in lymph vessels?
What causes the movement of lymph in lymph vessels?
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What gives a beaded appearance to the lymph ducts?
What gives a beaded appearance to the lymph ducts?
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Study Notes
Characteristics of Lymph Collecting Vessels
- Valves are present in lymph collecting vessels, which prevent backflow and ensure unidirectional flow of lymph.
Structure and Function of Lymph Ducts
- Smooth muscle cells in the walls of lymph ducts contract and relax in a rhythmic manner, helping to propel lymph forward.
Lymph Movement and Flow
- The movement of lymph in lymph vessels is caused by the contraction and relaxation of smooth muscle cells, as well as the contractions of surrounding skeletal muscles and breathing movements.
Lymph Duct Structure
- The presence of lymphoid follicles or aggregates of lymphoid tissue gives a beaded appearance to the lymph ducts.
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