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14 Cards in this Set
- Front
- Back
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list 3 functions of the lymphatic system
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1. returns fluids to blood
2. transports fats 3. defense [immunity] |
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list the components of the lymphatic system
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lymph
lymphatic vessels lymphatic organs |
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trace the pathway of lymphatic vessels
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lymphatic capillaries
affarent lymphatic vessels efferent lymphatic vessels lymphatic trunks lymphatic collecting ducts blood |
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list the names of the 2 terminal lymphatic ducts and the blood vessels into which they drain
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thoracic duct drains into left subclavian vein
right lymphatic duct drains into right subclavian vein |
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describe the structure of a lymph node
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sinuses with nodules [contain lymphocytes & macrophages]
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state the function of lymph nodes
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to filter lymph
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describe the structure of the spleen
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splenic lobules --> white pulp [lymphocytes] & red pulp [venous sinuses, lymphocytes, and macrophages]
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list 2 functions of the spleen
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filter blood & store blood
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list 2 functions of the thymus
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immunity & endocrine gland
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when does the thymus begin to degenerate
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in the early teenage years [puberty]
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list the 3 pairs of tonsils
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1. lingual
2. palatine 3. pharyngeal |
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list the 4 forces involved in the formation of tissue fluid and the direction and action of each
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1. BHP [blood hydrostatic pressure/HPc -- hydrostatic pressure of the capillaries]
due to pumping of heart pushes fluid OUT of capillary 2. IFHP [interstitial fluid hydrostatic pressure or HPif] due to fluid build-up in interstitial spaces pushes fluid INTO capillary 3. BOP [blood osmotic pressure OPc] due to blood proteins [especially albumins] pushes fluid INTO capillary 4. IFOP [interstitial fluid osmotic pressure or OPif] due to interstitial fluid solutes pushes fluid OUT of capillary |
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write the equation for the effective filtration pressure
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Peff= [forces out] - [forces in]
Peff= [BHP + IFOP] - [IFHP + BOP] |
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list 5 mechanisms of lymphatic flow
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1. muscular contractions
2. arterial pulsations 3. negative intrathoracic pressure created during inhalation 4. bileaflet valves 5. smooth muscle cell contraction in vessel wall [peristalsis] |
