______________ enters body passing __________ and ___________ barriersPresence of foreign __________ detected by _______________________ ingest and destroy the foreign antigen and release _____________ (__________)Chemicals attract _______ _______ ________ to the infection site and stimulate _____________________________ and natural killers (NK) cells are attracted to the ______________ site________________ is further stimulated activating additional immune cells____________ cells trigger hypothalamus to ____________ body temperatureBoth ____________ and ____________ cells may be destroyed during the immune defense attack on the infected area______________ immunity response is triggered and activated by the ____________ immunity (chemicals released by NK cells, neutrophils, and other cells) ________________ cells ingest pathogen

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