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Explain The Function Of The Lymphatic System

Decent Essays

Question 1
1. Describe the function of the lymphatic system and explain how its structure enables it to carry out its duties. Include what is lymph and how does it get into the lymphatic system, what happens to it along the way (and what structures are involved) and what happens to it when the lymph system is through with it...
The lymphatic system is composed of one-way, low pressure vessels, with blind ended capillaries that are remarkably permeable. The lymphatic endothelial capillary walls are anchored by collagen filaments, and have overlapping, flap-like mini valves that open when interstitial pressure is higher than inside the lymphatic capillary. The valves allow entry to not only fluid, but to larger particles as well; this includes proteins, pathogens, and cancer cells. The mini-valves are forced shut when pressure inside the capillaries is greater than the interstitial pressure. The vessels are equipped with multiple valves (in the lumen) to prevent the backflow of lymph once it is “milked” towards the subclavian duct, mainly by the squeezing action of the skeletal muscles, and the pressure from respiratory inspiration.
The lymphatic system’s role is to absorb fluid that is leaked from the blood capillaries and return it back into the systemic circulation via the left and right subclavian ducts, ensuring adequate blood volume. Additionally, it transports chyle, a fatty lymph absorbed in the small intestine through lacteals, also returning it to systemic

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