21 Flashcards
lymphatic system function
– Recover fluid lost from blood
capillaries
– Guard against pathogens
– Absorb lipids from small intestine
lymph
clear colorless
like blood plasma, low in proteins
lymph tissues taken up by
lymphatic vessels
lymph supplies
lymphocytes to bloodstream
Lymph in intestine is
chyle
– Contains fat droplets absorbed from digestion
Lymphatic Capillaries
vessels begin
have loosely connected overlapping endothelial cell (acts as flaps for valvue for backflow)
lymphatic gaps allow for
allow for large substances (i.e. proteins, cells) to enter lymphatic capillary
lymph in
face, abdomen, neck, legs
left side duct will bring back more lymph than the
right
correct lymph flow
cap
vessels
trunks
ducts
veins
(smallest to largest)
thoracic duct for what side
left side, lower extremitys, left arm
right lympathic duct for what
right arm and right upper diapgrahm
lymph tissue classified based on
loosely associated or densly
MALT (mucosa-associated lymphatic tissue)
in passages of respiratory, digestive, reproductive, and urinary tracts
LOOSE
screen for pathogens
Peyer patches
of distal small intestine, protect colon
– lymphatic nodules in the ileum
lymphatic organ
thymus, spleen, lymph nodes, tonsils, red bone marrow
primary lymph organs
Places where lymphocytes become immunocompetent (can detect pathogens and dont harm our tissues)
red bone marrow
B(one marrow) cells learn to recognize antigens
Site of hemopoiesis
thymus
t(thymus) cells learn to recognize antigen
shrinks after age 15
lymph nodes
Cleanse lymph and act as site of T and B cell activation
runs into lymph node
multiple afferent lymph vessel
runs out lymph node
one efferent lymph vessel
tonsils (3 types)
Patches of lymphatic tissue at entrance of pharynx
screen air we breath
spleen red pulp
erythrocytes,
will recycle shattered old red blood cells
