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33 Cards in this Set
- Front
- Back
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functions of lymphatic system |
body defense collect excess interstitial fluid and return it to the blood |
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lymph |
same as interstitial fluid *low conc. of plasma proteins |
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lymphoid tissues |
scattered throughout the body that contain a lot of lymphocytes |
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how does the size of lymphatic capillaries compare to blood capillaries? |
lymphatic are slightly larger |
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lymphatic capillaries |
collect interstitial fluid closed at one |
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lymphatic vessels |
move lymph through lymph nodes
have valves |
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the lymphatic vessels converge to form |
lymphatic trunks |
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lymphatic trunks |
empty into lymphatic ducts |
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lymphatic ducts |
return lymph to venous blood |
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how many lymphatic ducts? |
2 right and left
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volume of lymph returned to blood is about the same volume as |
the fluid lost from the blood |
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right lymphatic duct |
drains about 1/4 of the body
drains into the right subclavian vein |
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left lymphatic duct |
begins in abdomen as sisterna chyli
drains 3/4 of body into the left subclavian vein |
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factors that help lymph go against gravity |
skeletal muscle pump
respiratory pump
valves |
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where in the body is there no lymph? |
brain, cartilage, cornea
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lymphedema |
blockage of lymph flow from limb |
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3 types of lymphocytes |
t b nk |
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life span of lymphocytes |
long,
years or decades |
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lymphocytes circulate where? |
between blood and lymphatic tissue |
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where are lymphocytes produced? |
from hemoblasts in red marrow and t cells mature in thymus |
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lymphoid organs |
surrounded by fibrous connective tissue capusle
*lymph nodes, spleen, thymus |
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lymphatic nodules |
lack distinct boundaries (no capsule)
a lot are located in mucous membranes (tonsils, small intestine and appendix) |
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lymph nodes |
site of lymph filtration
lymph flows through channels called sinuses |
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cancerous lymph nodes will feel |
hard to the touch |
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swollen infected lymph nodes will feel |
tender to the touch |
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thymus location |
upper mediastinum |
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when is the thymus at its largest size? |
at puberty |
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function of thymus |
matures t cells makes some proteins that influence t cells |
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spleen location |
upper left side of abdominal cavity |
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functions of spleen |
phagocytosis of RBC
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2 tissues of the spleen |
red pulp and white pulp |
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red pulp |
contains a lot of blood cells and macrophages
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white pulp |
lymphoid tissue that contains a lot of lymphocytes |
