BIOL 153 Lecture Notes - Massage, Lymph Node, Natural Killer Cell
Document Summary
Wherever you have a capillary bed, you have lymphatic bed. Lymphatic beds take up excess fluid from capillary beds = to larger and larger lymphatic vessels = tissues= nodules = nodes = tonsils = eventually back to blood system. Lymphatic nodules/nodes = early detection of pathogens. Tonsils = very specialized type of lymph node. Thymus gland = maturation of the lymphocytes. High concentration of lymph nodes where the inside and outside environment is very similarly/coming closer together. No active pumping mechanism fluid enters the lymphatic capillaries very easily with a series of one way valves. Fluid balance: ecess interstitial fluid enters lymphatic capillaries and becomes lymph. Fat absorption: absorption of fat and other substances from digestive tract. Defense: microorganism and other foreign substances are filtered from lymph by lymph nodes and from blood by spleen. In the lymph nodule there are regions where there are only lymphocytes, and any pathogen that comes in through the fluid they attack it.
