Ch. 23 Flashcards
lympathic system contain
lymph
lymphocyties
lymphatic organs
lympathic system functions
produce lymphocytes
returns fluid and proteins to circulate
transport hormones nutrients and waste
lymphatic vessels begin as
capillaries
lymphatic capillaries are more
permeable than circulatory capilarries
lacteals are
small intestine capillaries
lymphatic tissues include
tonsils
appendix
gallbladder
pathogens enter tonsils then aggregate
lymphoid nodules peyers pathetches
lymph node function
remove and destroy microorganism and debris
lymph node structure
fibrous capsule
vessels of lymph nodes
afferent entters
efferent exit
outercortex of lymph nodes contain
proliferating b cells
middle cortex is the paracortex which is dominated by
t cells
lymph nodes concentrated in
cervical
axillary
inguinal
popliteal
abdominal
regions
lymph cervical supplies
neck
head
lymph axillary supplies
upper limbs
mammary glands
lymph inguinal supplies
reproductive
lymph popliteal supplies
lower legs
lymph abdominal supplies
trunks
thymus daughter cells mature into
t cells and migrate into medulla
in cortex lymphatic stem cells divide to produce
daughter cells
blood thymus barrier prevents
premature stimulation of t cells that are still developing
spleen provides
lymphocyte proliferation and immune surveillance
spleen removes
aged/defective erythrocytes
platelets
debris from blood
spleen stores
platelets and iron for later use
early erythrocytes in fetus produced by
spleen
