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32 Cards in this Set
- Front
- Back
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What are the lymphatic system's functions? |
reabsorb fluid, transport dietary lipids, and generate immune response |
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What are the four kinds of lymph vessels? |
capillaries, vessels, trunks and ducts |
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What are lacteals? |
the lymphatic vessels of the small intestine in the GI tract, they absorb digested fats, lipids and nutrients. Chyle drains from these lacteals. |
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Lymphatic capillaries have _____ |
endings |
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What flows into lymphatic capillaries? |
interstitial fluid |
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Like veins, lymphatic vessels have ____ |
valves |
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Capillaries merge to form _____ |
vessels |
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What does the jugular trunk drain? |
head & neck |
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What does the subclavian trunk drain? |
upper limbs |
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What does the bronchomediastinal trunk drain? |
thoracic |
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What does the intestinal trunk drain? Contains what? |
abdominal and small intestine; so contains lymph and chyle. |
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What does the lumbar trunk drain? |
lower limbs and abdominopelvic. |
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Where does the right lymphatic duct empty? |
into the right subclavian vein and right internal jugular vein. |
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Where does the thoracic duct empty? |
into the left subclavian and left internal jugular. |
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Ducts empty into ____ |
bloodstream |
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What is edema? |
abnormal accumulation of interstitial fluid |
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What is lymphedema? |
compromised lymphatic system leads to localized fluid retention |
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How do nodules differ from organs? |
nodules have no capsule, and are smaller than organs. |
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What are the two lymphatic nodules? |
MALT (Mucosa-Associated Lymphatic Tissue) and the tonsils |
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What does the MALT do? |
-detects antigens -prominent in small intestine (peyer patches) and in respiratory, urinary and genitals |
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What do tonsils do? and name the three types. |
-crypts trap material for ID by lymphocytes -several types: pharangeal (adenoids), palatine, lingual
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What are the three lymphatic organs? |
thymus, lymph nodes and spleen. |
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what are the different lobes of the thymus? |
lobules: cortex and medulla (thymic corpuscles) |
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What is the thymus a site for? |
T-lymphocyte maturation (immune response) |
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Where is the thymus located? |
anterior mediastimen, in front of heart |
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What are lymph nodes? |
-small oval structures -found in clusters along lymph vessels -filters antigens from lymph |
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What happens if an antigen is found? |
the germinal center responds |
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What does the spleen have? |
it has white pulp and red pulp |
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What is white pulp? |
-associated with arterial supply -monitors blood for foreign material, bacteria and antigens |
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What is red pulp? |
-associated with venous supply -serves as blood reservoir - so when we need erythrocytes, they supply the blood with them. -where erythrocytes go to die (RBCs) |
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what is the hilum/hilus? |
where everything plugs into |
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Overall, the lymphatic system... |
-always is draining lymph fluid -always surveying blood for pathogens -always picking up nutrients |
