lymphatic system Flashcards
what does the lymphatic system do
returns interstitial fluid to the blood, absorbs fat and fat soluble vitamins, produces lymphocytes
what system does the lymphatic system supplement to
circulatory
the lymphatic system has no
heart/muscular pump
fluid found in spaces around cells, and between blood (capillaries) and tissues
interstitial fluid
function of interstitial fluid
brings O2 and nutrients to cells and removes waste products from cells
what is interstitial fluid made out of
water, lymphocytes, granulocytes, digested material, hormones, salts, CO2, urea
interstitial fluid that is absorbed by lymph capillaries and returned to venous blood
lymph
swelling due to fluid not being reabsorbed and accumulates bc of the increase in osmotic pressure
edema
function of lymphatic vessels
carries fluid away from the tissues (one way)
what is lymphatic vessels made out of
endothelium tissue (simple squamous cells overlap to create one way valves)
where are lymphatic vessels not found
bone marrow, CNS, epidermis, cartilage, spleen, eyeball, inner ear
smallest lymph vessels
lymph capillaries Begin in tissue as blind-ended sacs (closed at one end)
lymphatic vessel ducts
thoracic and right lymphatic ducts
what does Thoracic duct do
Receives lymph from left side of chest, head, neck, abdominal area and lower limbs
Returns lymph to SVC
what does right lymphatic duct do
Receives lymph from right arm, right side of head and upper trunk
Returns lymph to SVC
Path of lymph:
Afferent lymphatic vessel
Lymph Sinus
Hilum
Efferent lymphatic vessel
what does lymph node do
bean shaped, Filter lymph before returning to blood
lymph nodes are covered by _ and divide into _
fibrous connective tissue (capsule), compartments (lymph nodules)
Lymph nodules=
lymphocytes and macrophages
Lymphocytes are produced in
germinal center of nodule
Lymph sinuses separate
lymph nodules
lymph nodes are regionally located
alone or in clusters
3 superficial clusters of lymph nodes
Inguinal nodes= groin
Axillary nodes= armpit
Cervical nodes= neck
Lymphadenitis
Swelling of lymph nodes
Harmful substances occur in large quantities = cannot be destroyed by lymphocytes
