System/capillaries/vessels Flashcards
Fluid in vessels
Lymph
Cleanse lymph
Lymph nodes
(/)and tissues provide structural
basis of immune system by housing phagocytic
cells and lymphocytes
Lymphoid organs
Structures include
spleen, thymus, tonsils, lymph nodes,
other lymphoid tissues
returns interstitial fluid and
leaked plasma proteins back to blood via:
• Remember that “interstitial fluid” is the fluid between
blood vessels and () cells (ECF – extracellular fluid)
• () vessels: elaborate network of drainage vessels
• Circulates ~ 3L interstitial fluid per day
• Once interstitial fluid enters lymphatics, it is called lymph
tissue
Lymphatic
Lymph always flows in direction towards
Heart
Lymph vessels include lymphatic () and
() lymphatic vessels
Lymphatic capillaries: Weave between tissue cells and blood
capillaries
Similar to blood capillaries; but different
Proteins, cell debris, (), and cancer
cells can enter lymphatic system
capillaries
larger
pathogens
Larger lymphatic vessels:
Lymph capillaries drain into increasingly larger vessels
called (/) vessels
* Consist of collecting vessels, trunks, and ()
* Have structures and tunics similar to veins, except:
* Have thinner walls, with more internal valve
collecting lymphatic
ducts
Lymph is delivered from trunks into one
of two large lymphatic ():
ducts
Right lymphatic duct
Thoracic duct
drains right upper arm and
right side of head & thorax
Right lymphatic duct:
drains left arm, left side of head &
thorax, and all lower extremities
Thoracic duct
*Each empties lymph into venous circulation at junction of internal jugular and () veins
on its own side of body
subclavian