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| | Immune System |
 | | An animals Immune System: system which protects the body from foreign invaders (viruses, bacteria, cancer, etc.)','(immun = safe, free)','../../sounds/bio105/immune.wav')" onMouseOver="window.status='Protects body from foreign invaders'; return true">immune system protects its body from intruders: bacteria, viruses, parasites, cancer cells, etc. An immune system is present in several animal groups, especially within the vertebrates. |
 | | Unfortunately, this leaves the person with no immune system, so (s)he must be extremely careful during that time to avoid all possible pathogens. |
 | | However, if the immune system is stressed and not functioning properly, a cancer cell may multiply before the immune system has a chance to kill it. |
| biology.clc.uc.edu /courses/bio105/immune.htm (1139 words) |
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