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35 Cards in this Set
- Front
- Back
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fluid forced out of capillaries by HP (can be 3 liters/day) |
interstitial fluid |
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main organ of lymphatic system |
lymph nodes |
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other organs of lymphatic system (3) |
spleen tonsils thymus |
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interstitial fluid ----> lymphatics = _____ |
lymph |
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thin walled closed end tubes in capillary beds |
lymph capillaries |
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lymphatic system smallest to greatest (5) |
capillary --> collecting vessels with valves --> nodes --> trunk --> duct |
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the lymphatic system is a ____ way system |
one |
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specialized lymph capillaries present in intestinal mucosa absorb digested fat and deliver chyle (fatty lymph) to the blood |
lacteals |
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drains right upper arm and right side of head and thorax |
right lymphatic duct |
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arises from cisterna chyli and drains rest of the body |
thoracic duct |
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empty lymph into venous circulation at junction of internal jugular and subclavian veins on its own side of the body |
lymphatic ducts |
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"main warriors" of immune system |
lymphocytes |
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what are the two types of lymphocytes? |
T & B cells |
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anything the body perceives as foreign (parasites,cancer, virus, bacteria, fungi, toxins, parasitic worms) |
antigen |
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____ and _____ protect the body from antigens |
T and B cells |
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manage immune response attack and destroy foreign cells |
T cells |
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produce plasma cells, which secrete antibodies antibodies immobilize antigens |
B cells |
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phagocytize foreign substances & help activate T cells |
macrophages |
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spiny-looking cells that capture antigens & take back to nodes |
dendritic cells |
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produce a stroma (reticular, CT), that supports other cells in lymphoid organs |
reticular cells |
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houses and provides a proliferation site for lymphocytes furnishes a surveillance vantage point |
lymphoid tissue |
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two main types of lymphoid tissue |
diffuse lymphatic tissue lymphatic nodules (or follicles) |
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comprises scattered reticular tissue elements in every body organ |
diffuse lymphatic tissue |
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houses phaygocytes and function in defense and disease resistance (immune) |
nodes |
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aggregations occur near the body surface in ____, _____, and ____ regions |
inguinal axillary cervical |
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macrophages destroy microbes and debris |
filtration |
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monitor for antigens and mount an attack against them |
immune system activation |
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bean shaped external fibrous capsule trabeculae extend inward and divide the node into compartments cortex medulla |
lymph node |
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largest lymphoid organ site of lymphocyte proliferation and immune surveillance and response cleanses the blood of aged cells and platelets, and debris |
spleen |
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a bilobed organ secretes hormones that cause T cells to become immunocompetent |
thymus |
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(MALT) protects the digestive and respiratory systems from foreign matter occurs in the genitourinary organs too EXAMPLES: tonsils, appendix (digestive tract), Peyer's patches (digestive tract), lymphoid nodules in the walls of the bronchi (respiratory tract)) |
mucosa-associated lymphatic tissue |
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gather and remove pathogens entering the pharynx via food or inhaled air contain invaginations (crypts) |
tonsils |
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what are the four types of tonsils? |
palatine lingual pharyngeal tubal |
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destroy bacteria preventing them from breaching the intestinal wall generate "memory" lymphocytes for long-term immunity |
Peyer's patches appendix |
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isolated clusters of lymphoid tissue, similar to tonsils found in the wall of distal portion of the small intestine |
Peyer's patches |
