KAAP221 Lecture Notes - Lecture 10: Bone Marrow, Lymph Node, Extracellular Fluid
12 Apr 2018
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Lymph nodes, tonsils, malt, appendix, spleen flows towards the heart; not a circulating system like the vasculature. Collect lymph and transport to larger lymphatic vessels. Closed at one end rather than forming continuous tubes. Thin walls (basement membrane is incomplete or absent) Contraction of surrounding skeletal muscle aids in movement. Permit entry of fluids and solutes (also viruses, bacteria, cell debris) Important in transport of lipids absorbed in gi: distribution of lymphatic vessels, in small intestine, areas lacking lymphatic capillaries. Cornea of eye: lymphatic flow, lymph from lymphatic capillaries flows into: Accompany deep arteries and veins supplying skeletal muscle ** Both sets of vessels converge to form lymphatic trunks. Collecting ducts - 2 large vessels receive lymph from lymphatic trunks. Thoracic duct - collects lymph from body parts inferior to diaphragm, l side of body superior to diaphragm; drains into l subclavian vein; ~42 cm long.
