The flow of lymph in lymphatic vessels is maintained by:
Correct answer: C. Breathing movements, activity of skeletal muscles and valves
- A. Heart, activity of smooth muscles and valves
- B. Activity of skeletal muscles, heart and breathing movements
- C. Breathing movements, activity of skeletal muscles and valves
- D. Exercise, breathing movements and heart
Explanation
Option[a] heart has no role in lymph flowOption[b] Heart has no role in lymphOption [c] All mentioned factors affect the flow of lymph in lymphatic vessels i.e. deep breathing helps the flow of the lymph fluid through the body, movement of skeletal muscle increases the lymph flow and valves function to bias lymph flow back towards the heart.Option[d] Heart and exercise play no role in lymph flow
This question appeared on the UHS MDCAT 2010 paper, which you can sit online with every answer explained.
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About Lymphatic System
The lymphatic system returns excess tissue fluid to the bloodstream and supports immune defence through lymph, lymph vessels, lymph nodes, the spleen, thymus and tonsils. It also transports absorbed fats from intestinal lacteals, which distinguishes lymphatic circulation from the blood vascular system.
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