1. The Body's Defenses TSW2 GL & TS

2. The Immune System The immune response from immune system Q) What is "Immune system"? A: Your body's disease fighting system. can distinguish between different kinds of pathogens react to each kind of pathogen with a defense targeted specifically at the pathogen Pathogen= Bad things that attack our bodies (Ex. viruses) White blood cells=lymphocytes (Lim Fuh syts)

3. T Cells Identify pathogens and distinguish one kind of pathogen from another. B Cells Produce chemical that help destroy each kind of pathogen. = antibodies

4. AIDS, a Disease of the Immune System AIDS=HIV http://www.youtube.com/watch?v=68I7JlVhuhY HIV makes the Immune system weaker HIV can spread by bloods http://www.youtube.com/watch?v=D6XncLNNGQ0