Biology 11: Immune System and Disease Worksheets

b. the first line of defense of the immune system has succeeded. a. the second line of defense of the immune system is activated. 6. A chemical that is produced as a part of the inflammatory response is . d. flagella. c. cilia. b. monoamine. a. histamine. 7. A type of human immune system cell that ingests pathogens by phagocytosis is . d ... ................
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