Term
| Immunity function of Lymphatic system |
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Definition
provides structural basis of the immune system
fluids from all capillary beds are filtered
immune cells stand ready to respond to foreign cells or chemicals encountered |
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| Lipid absorption function of lymphatic system |
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Definition
| Lacteals in small intestine absorb dietary lipids |
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Term
| Fluid recovery function of lymphatic system |
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Definition
abosrbs plasma proteins and fluid (2 to 4 L/day) from tissues and returns it to the blood stream
Once interstitial fluid enters lymphatics, it is called lymph |
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Definition
pulsations of nearby arteries
contractions of smooth muscle in the walls of the lymphatics |
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Definition
T cells, B cells
main warriors of the immune system |
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Definition
| Phagocytize foreign substances and help activate T cells |
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Definition
| capture antigens and deliver them to lymph nodes |
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Definition
| produce stroma that supports other cells in lymphoid organs |
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Definition
| comprises scattered reticular tissue elements in every body organ |
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Term
| Lymphatic follicles (nodules) |
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Definition
| solid, spherical bodies of tightly packed reticular elements and cells. Germinal center composed of dendritic and B cells |
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Term
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Definition
principal lymphoid organs of the body. Filter lymph- macrophages destroy microorganisms and debris
Immune system-- lymphocytes are activated and mount an attack against antigens |
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| contains follicles with germinal centers, heavy with dividing B cells |
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Term
| Dendritic cells of lymph nodes |
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Definition
| nearly encapsulate the follicles |
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Term
| Deep cortex of lymph nodes |
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Definition
| houses T cells in transit |
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Term
| Circulation in lymph nodes |
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Definition
lymph enters via afferent lymphatic vessels and exits the node at the hilus via efferent vessels.
Fewer efferent vessels, causing flow of lymph to stagnate, allowing lymphocytes and macrophages time to carry out functions |
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