Term
| 2 major functions of the lyphatic system |
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Definition
| gather interstitial fluid. Attacks foreign substances and microbes that have entered the body |
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Term
| What are lymphoid organ made of |
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Definition
| reticular connective tissue |
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Term
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Definition
| tonsils, thymus, peyer's patches, appendix, spleen, lymph nodes and other scattered "follicles" of lyphatic tissue |
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Term
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Definition
| lymph capillaries, collecting vessels, trunks, ducts |
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Term
| structure of lymphatic vessels |
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Definition
| one-way network in which fluid flows only toward the heart. |
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Term
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Definition
| permterable, admit protiens and particulate matter from the interstitial space |
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Term
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Definition
| slow, maintained by skeletal muscles contrations, pressure changes in the thorax, and contractions of the lymphatic vessels. backflow is prevented by valves |
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Term
| what cells are included in the lyphoid tissues |
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Definition
| lymphocytes (T and B cells) plasma cells, macrophanges, dendrite cells, and reticular cells |
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Term
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Definition
| discrete encapsulated structures containing both diffusely arranged and densereticular tissue. Filter lymph and activate the immune system |
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Term
| Structure of a lymph node |
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Definition
| has fiberous capsule, and a cortex, and a medulla. |
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Term
| Circulation in the lyph nodes |
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Definition
| lymph enters the lymph nodes via afferent lymphatic vessels and exit via efferent vessles, there are fewer efferent vessels, lymph stagnates within the lymph node allowing time for it's cleansing |
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Term
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Definition
| site for lymphocyte proliferation and immune function, & destroys aged or defective RBC and bloodborne pathogens |
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Term
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Definition
| most functional during youth. Provides the enviroment in which T lymphocytes mature and become immunocompetent |
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Term
| Tonsils & Aggregates of lymphoid follicles |
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Definition
| Peyer's pathces of the intestinal wall, lymphoid follicles of the appendix, tonsils of the pharnyx and oral cavity, and follicles in the genitournary and respiratory tract mucosae are nown as MALT. They prevent pathogens from prenetrating the mocous membrane lining |
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