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A&P Ch. 20
Lymphatic system
Question | Answer |
---|---|
Name the main functions of the lymphatic system | Return interstitial fluid to circulation, Absorb dietary lipids, defend against microorganisms, control abnormal host cells |
Excess fluid not returned to blood and allows for leukocyte movement | Lymph |
Name charecteristics of lymphatic collecting vessels | Smae three layers as veins, thinner walls w/ more internal valves, converge on lymphatic trunk |
Collect lymph from collecting vessels, drain into subclavian veins | Lymphatic trunks and ducts |
How is lymph transported since the lymphatic system lacks a pumping organ? | Lymph movement is assisted by contractions of nearby muscles and organs |
Primary lymphoid organs of the body | Lymph Nodes |
What are the functions of the lymph nodes? | Activating immune system, filter lymph |
This organ triggers development of T cells and atrophies in adulthood | Thymus |
Functions of the spleen? | B cells monitor for pathogens, macrophages remove old erythrocytes |