Exam 4 Part 1 Flashcards
Lymph
interstitial fluid derivative
lymphatic system
lymph capillaries and vessels, lymph organs, lymph nodes, and lymphatic cells
lymphatic functions
immunity/disease response
auxiliary circulatory system
lymphatic immunity/disease response
involved in maturation and replication of lymphocytes
filters lymph
lymphatic auxiliary circulatory system
fluid from blood capillaries diffuses sinto tissues; only 85% can return to blood via blood capillaries
excess fluids drained via lymphatic system
lymphatic capillaries
begin as open ended tubes within most tissues
more porous than blood capillaries
anything big enough (interstitial fluid, proteins, microorganisms, fats, etc) can enter
lacteals
specific type of lymph capillaries; collect fats
lymph vessels
lymph capillaries drain in here; resemble veins -> thin walled, 3 wall layers, valves
allows substances entry to blood system that are too large to enter blood via blood capillaries
lymph ducts
right lymphatic duct
thoracic duct
both drain into subclavian veins
right lymphatic duct
drains upper right quadrant of body
thoracic duct
drains all of body except right quadrant
lymph nodules
oval clusters of lymphatic cells (not organs)
immune system cell production (some)
may occur in groups eg. tonsils; masses of lymph nodules in nasal and oral cavities and in pharynx
may also occur as part of lymph organs
Lymph organs
lymph nodes
Spleen
thymus
red bone marrow
lymph nodes
bean-shaped organs, occur along lymph vessels (often in clusters) throughout body
capsule, cortex, medulla
medulla of lymph nodes
contains sinuses -irregular channels lined with macrophages
