lymphatic system Flashcards
lymphatic system
return excess tissue fluid and leaked plasma proteins to blood vascular system via lymphatic vessels, removes cellular debris & infection
immune system
protects body from foreign organisms, confers immunity to disease
main components of immune system
lymphocytes, lymphoid tissue, lymphoid organs
what is the function of lymphatic vessels?
collect excess tissue fluid and blood proteins and return them to bloodstream
how does the fluid flow?
only towards the heart, a one-way path
what is the tissue fluid called when it is within lymphatic vessels?
lymph
lymphatic capillaries
smallest lymph vessels, first to receive lymph, found where blood capillaries are, permeable causing them to collect tissue fluid and bacteria/viruses
lymphatic collecting vessels
collect from lymph capillaries, accompany blood vessels (superficial travel with superficial veins, deep ones in thorax & abdomen with deep arteries)
lymph nodes
found along lymphatic collecting vessels, lymph is filtered on its way to venous system
lymphatic trunks
collect lymph from collecting vessels
lymphatic ducts
empty into great veins of neck
highly permeable vessels near blood capillaries…
increase volume of tissue fluid, minivalve flaps open & allow fluid to enter
high permeability allows the entrance of…
tissue fluid & protein molecules, bacteria, viruses & cancer cells
lacteals
specialized lymphatic capillaries that receive digested fats, fatty lymph (chyle)
where are lacteals located?
in villi of small intestine
