BIOL 100 Lecture Notes - Lecture 8: Cestoda, Itch, Protist
Document Summary
Pathogens- a bacterium, virus, or other microorganism that can cause disease. White blood cells= leukocytes- main cells in the immune system- made by stem cells in the bone marrow. 2 main types: phagocytes- eater cells that engulf up pathogens. E(cid:454)a(cid:373)ple: ma(cid:272)rophages (cid:862)(cid:271)ig eaters(cid:863: lymphocytes- white blood cells in lymph tissue, t cells: (cid:862)tou(cid:272)h kill(cid:863)/ th(cid:455)(cid:373)us (a gla(cid:374)d (cid:449)here t cells develop: mature) they attack cells that have pathogens inside. T cells pumps poison into a cell with a pathogen or a foreign cell: kills the cell. Antigens are self-markers to signify self-versus foreign cells.
