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What are the 4 functions of the lymphatic system
return lymph to general circulation, produce maintain and distribute lymphocytes, monitor for pathogens, resist infection and disease
What are the 4 organizations of the lymphatic system?
lymph, lymphatic vessels, lymphoid tissues and organs, lymphocytes
what respond to environmental pathogens and toxins abnormal cells, cancers and disease?
lymphocytes and phagocytes
which defense blocks and attacks any potential infectious organisms and cannot distinguish one attack from another
which cells identify and attack foreign cells of pathogens and cells infected by viruses
cytotoxic T cells
what are the 3 things regulatory T cells regulate?
immune system function. activity of immune cells, sensitivity or immune response
NK will detect and attack any _________ __________ _________
foreign cells, virus infected cells, and cancer cells
what are the 3 major functions of the spleen?
removal or abnormal cells, storage of recycled iron, initiates immune responses
what are the 7 types of nonspecific defenses?
1. physical barriers 2. phagocytic cells 3. immunological surveillance 4. interferons 5. complement 6. inflammation 7. fever
what are the 2 types of secretions of physical barriers?
ones that flush away materials and ones that kill microorganisms
what are the 3 ways macrophages respond to pathoges
engulf them, bind to it, release toxic chemicals
chemical messengers released by tissue cells to coordinate local activities and act as hormones to affect whole body are called _______
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