cv - lymphatic system Flashcards
what makes up the lymphatic system
Network of organs, vessels and tissues
describe the accessory fluid
return route to the blood
the lymphatic system is vital to what other system in the body
immune system
it is complementary to what other body system
Cardiovascular system
what is lymph
Fluid of the system (clear, pale yellow) ~interstitial fluid; 32L/day drained into system; returns lost plasma proteins to bloodstream in lymphatic vessels
what is lymphatic tissue
Structures and organs containing lymphatic tissue – a specialised connective tissue that contains large numbers of lymphocytes
what is bone marrow
Stem cells develop into RBC & WBC
whats the 3 functions of lymphatic system
Drain tissue spaces of excess interstitial fluid and return it to the cardiovascular system.
Transport dietary lipids and lipid-soluble vitamins (A, D, E & K) from the GI tract to the blood
Protect the body from foreign cells, microbes and cancer cells through immune responses.
what are the smallest lymphatic vessel
lymphatic capillaries
explain lymphatic capillaries
Slightly larger than blood capillaries, closed-ended
Pressure in tissues will force fluid into them
Overlapping endothelial cells, like a one-way valve, so fluid not flow out
Found throughout body except in CNS, bone marrow, portions of spleen and avascular tissues.
lymphatic capillaries merge to form what
form larger vessels: lymphatic ducts
- Thin walled and more valves than veins
lymphatic vessels periodically have what
lymph nodes
explain lymph nodes
Lymphocytes in capsular structure
The left thoracic duct—-> Left subclavian vein at junction with jugular
Right lymphatic duct —> Right subclavian vein
explain lymph flow
Unlike cardiovascular, system has no pump
Muscle contraction
1-way valves,
Respiratory pressure
Smooth muscle contraction in lymph vessel wall.
lymphatic organs can be divided into what
primary and secondary organs
