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18 Cards in this Set
- Front
- Back
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What are the THREE functions of the lymphatic system?
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Maintain fluid balance in tissue
Fight disease Absorb fats from the digestive system |
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Which lymphatic organs function is to provide a place where phagocytic cells are eaten up?
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Lymph nodes
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Which lymphatic organs function is primarily to break down old red blood cells?
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Spleen
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Which lymphatic organs function is to be the birthplace for T cells?
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Thymus
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Which lymphatic organs function is to be the first line of defense for the nasal and oral areas of the body?
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Tonsils
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What is lymph? what is it made up of?
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Lymph is the interstitial fluid collected in the lymph vessels. It contains PROTEINS, MICROORGANISMS, FATS.
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How is lymph circulated through the body?
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Lymph flows TOWARD THE HEART ONLY! thus it is NOT a closed system (like the circulatory system) instead it is a one-way system.
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How is lymph circulated to the largest veins in the body?
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RECALL THERE IS NO PRESSURE IN LYMPH VESSELS!
Lymph vessels must rely on their valves to push lymph throughout the body. |
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What do we know about the lymph systems regenerability?
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Lymph nodes and vessels can be regenerated.
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Lymphatic capillaries
-AKA -made up of -Found mostly in -function to |
lacteal capillaries
one layer of endothelial lining Digestive system Function to pull ONLY FAT from the intestines (mostly small) into the liver (via hepatic portal vein). |
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Why are lymphatic capillaries interlaced with regular capillaries?
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So that they can abstract the rest of the nutrients (proteins, sugars).
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What are lymph ducts?
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largest lymph transporters that collect lymph from lymph nodes and lymph trunks and return it to the circulatory system
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How many main lymph ducts are their? what are their names?
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2;
Thoracic duct Right lymphatic duct |
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Thoracic duct
- size of the duct (relative to right lymphatic duct) -will empty interstitial fluid from what % of the body -where specifically will it collect fluid -what vein(s) will it return it to the circulatory system. |
Largest lymph duct in the body
75% left side of the body, brain, and arm as well as the bottom of the body. |
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Right lymphatic duct
- size of the duct (relative to thoracic duct) -will empty interstitial fluid from what % of the body -where specifically will it collect fluid -what vein(s) will it return it to the circulatory system. |
smaller than thoracic
25% Right side of the body, arm and the whole upper part of the body (head, neck). |
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What vein will the thoracic duct return fluid to the circulatory system?
Right lymphatic duct? |
Thoracic duct- in the left subclavian (enters along with jugular vein).
Right lymphatic- Right subclavian (where the jugular enters as well). |
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What are lymph nodes?
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As we said earlier where phagocytes are destroyed.
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If lymph only travels in one direction... what are afferent and efferent lymph vessels?
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Lymph enters lymph nodes through afferent vessels (further from the heart) and exit the same lymph node through efferent lymph vessels
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