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13 Cards in this Set
- Front
- Back
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lymph nodes
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only organs that filter lymph
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fewer ___ vessels...
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efferent, slows flow through node
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reticular cells and macrophages
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phagocytize foreign matter
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respond to antigens
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lymphocytes
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lymphatic nodule
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germinal centers for B-cell activation
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tonsils
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covered by epithelium
-pathogens get into tonsilar crypts and encounter lymphocytes |
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types of tonsil
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palatine
lingual pharyngeal |
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palatine tonsil
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pair of posterior margin of oral cavity
-most often infected |
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lingual tonsils
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pair at root of tongue
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pharyngeal tonsils
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adenoid
single tonsil on wall of pharynx |
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thymus
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lymphatic organ
primary organ houses developing lymphocytes and secretes hormones that regulate their later activity |
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reticular epithelial cells in thymus
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form blood thymus barrier in cortex
-isolate developing t-lymphocyte from foreign antigens |
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thymus
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secrete hormones(thymopoiten, thymosin, thymulin)
promote development and action of T lymphocytes |
