circulation Flashcards
lymphatic system: explain structure and function
what restores fluid lost from bulk flow
lymphatic system
where is lymphatic system located with respect to capillaries
wherever blood capillary (closed loop), lymphatic capillary (blind ended) beside
what happens to the lost fluid
diffuses into lymphatic capillaries
what prevents efflux of fluid in lymphatic capillaries
one way valves
key roles of lymphatic system
get excess fluid back into blood; immune surveilance
properties of lymphatic system
lymph nodes (activate lymphocytes if pathogen present); no pump to induce flow; drainage (3L per day) to back into blood at major areas
what are the major areas of drainage
right lymphatic duct, thoracic duct, right and left subclavian veins
when does oedema occur
if rate of production is greater than rate of drainage, or a parasitic blockage of lymph nodes
what does oedema caused by parasitic blockage of lymph nodes lead to
elephantiasis
