1. 2.9 Fighting Disease Pages 120-123

2. Pathogen A disease causing microorganism

3. Syptoms From: tissue destruction body’s response to the invasion

4. toxins Many bacteria produce toxins that travel throughout the body Examples: Clostridium tetani locks muscles Corynebacterium diphtheriae prevents cell organelles from manufacturing proteins

5. External defenses Skin is a barrier Sweat contains salt and amino acids that poison bacteria Cells secrete mucous which captures and digests bacteria Cilia sweep particles up and out of the airways.

6. External defenses Tears contain enzymes Stomach acids kill bacteria in food and water

7. Lymphatic System Lymph is a transparent fluid containing lymphocytes. Lymph nodes and the spleen filter out microorganisms Bone marrow produces special WBC’s

8. Antibodies Response to antigens (foreign invaders) Antibodies attach to antigen and inactivate it Flag cell for macrophage consumption

9. Active Immunity Antibodies are specific

10. Passive immunity Mother to baby Plasma received from immune organism

11. Resisting Bacteria Infection Sterilization Disinfectants Antispetics Extermination Antibacterial medication

12. White Blood Cells Macrophages: engulf and digest invaders