Chapter 20 — Lymphatic System Flashcards
lymphatic system provides support to…
cardiovascular system
immune system
_________ vessels are not circulatory
lymphatic
function of lymphatic vessels
contain lymph
explain how lymphatic system supports CVS
fluid exchange is unequal — blood loses more fluid than it gains
edema in tissues
edema pulls on fibers, causing incomplete junctions in LVs to widen
fluid drains out of tissues into LYS
lymphatic vessels deliver fluid back into the CVS at the subclavian artery
_______ & ________ regulate fluid exchange between tissues and LYS
osmosis & diffusion
LYS delivers fluid to the…
subclavian artery
function of lymph nodes
contain a variety of WBCs that destroy antigens in the lymph
lymph nodes are concentrated…..
because…
cervical, axillary, inguinal, abdominal
because they are near body openings where antigens can enter
function of lymphatic nodules
loose mass of lymphatic cells not bound by connective tissues which contain WBCs
location of lymph nodules given
why are they there?
mesentary of GI tract
destroy antigens in food
another example of lymphatic nodules
tonsils
2 areas of spleen
red pulp region
white pulp region
function of red pulp region
blood related functions (removes ruptured/defective blood cells from blood to be recycled)
function of white pulp region
contains variety of WBCs which attack antigens in blood flowing through spleen
‘military bases’ of immune system large to small
spleen (white pulp)
lymph nodes
lymph nodules
