lymphatic system

function of lymphatic system

collects some fluid in blood that escapes from blood capillaries and returns it to the circulatory system

step 1

blood enters capillaries at high pressure forcing some fluid through walls

step 2

excess fluid removed by vessels of lymphatic system

lymphatic system composed of

- network of lymph capillaries join to larger lymph vessels

- lymph nodes

lymph vessels direction

one-way system carrying fluid away from tissue

lymph vessels what

blind-ended tubes in spaces between cells

lymph vessel network

network of vessels join to from 2 lymphatic ducts

lymphatic ducts func

empty lymph into large veins in upper chest

lymph moved as a result of

smooth and skeletal muscles and valves

lymph nodes location

intervals along lymphatic vessels

lymph nodes numerous in

neck, armpit, groin, alimentary canal

lymph nodes shape

bean shaped surrounded by capsule of connective tissue forming framework

lymph nodes tissue

masses of lymphoid tissue

lymphoid tissue contatin

lymphocytes, macrophages, plasma cells

lymphocytes, macrophages, plasma cells do

protect against disease

lymph nodes func

filter the fluid

how re-join circulation

- collects in ducts before emptying into left and right subclavian veins re-joining circulation

lymph capillaries (relative to blood capillary) permeability

more permeable

lymph capillaries (relative to blood capillary) valve

has valves

lymph capillaries (relative to blood capillary) size

relatively larger and wider

lymph capillaries (relative to blood capillary) end

close at one end

blind ended

closed at one end

lymph capillaries (relative to blood capillary) carries

lymph

lymph capillaries (relative to blood capillary) pressure

lower

lymph capillaries (relative to blood capillary) fluid

absorbs fluid from interstitial space

blood capillary fluid

adds fluid to interstitial space

blood capillary pressure

higher

blood capillary permeability

less permeable