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23 Cards in this Set

  • Front
  • Back
Lymphatic system
general functions
2 general functions:
-maintain fluid balance
-protect body from infection and disease
maintain body fluid
lymphatic cappilaries take excess fluid from cappilaries, filter it, and bring back to the heart
function of lymphatic system
-immunity
-fluid recovery
-lipid absorption
immunity
-fluids from all cappilary beds are filtered
-immune cells stand ready to respond to foreign cells or chemicals encounteres
fluid recovery
-absorbs plasma proteins and fluids(2-4l/day)from tissues and return it to the bloodstream
-interferance with lymph drainage leads to severe edema
Lipid Absorption
lacteals in small intestines absorb dietary lipids
lymph
clear , colorless fluid, similar to plasma but much less protein
lymphatic cappliaries are closed
at 1 end
lymphatic cappilaries are tethered
to surrounding tissue by protein filaments
lymphatic cappilaries and endotheliel cells
loosely overlapped
-allow bacteria and cell enterance to lymphatic cappilary
-creates valve-like flaps that open when interstitial fluid pressure is high, and close when its low
route to lymp flow
lymphatic cappilaries
collecting vessels
lymphatic trunks
collecting ducts
collecting vessels
course through many lymph nodes
lymphatic trunk
drain major portion of body
collecting ducts
right lymph duct
thorasic duct
right lymph duct
empties into right subclavian
thorasic duct
larger and longer, empties into left subclavian vein
lymph flows
on pressure and speed
lymph moves
by rythmic contractions of lymphatic vessels
-stretching of vessel stimulates contraction
lymphatic flow aided by
skeletal muscle
aiding flow from thorasic cavity
thorasic pump
valves
prevent backward flow
what draws lymphs in
rapidly flowing blood from subclavian veins
helps lymphatic return
exercizing