1. Ms. Morris’ Lesson Aim: How does the body fight infections?
Homework: Immune System Worksheet
Do–Now: Can you write down the
complete names for HIV &
AIDS?

2. Mini Lesson: Immunity
1.defends body from disease-causing organisms Antigens – foreign substances i.e. pathogens,
germs, viruses, bacteria etc.
2. destroys & removes dead/damaged cells from body

3. First Line of Defense: Skin: keeps pathogens from entering
Mucus, cilia, sneezing, coughing:
Saliva

4. Second Line of Defense:
Inflammatory Response: fluid & WBC’s attack pathogens in the area of infection (i.e. cut – swollen, red)
Phagocytes: WBC’s that engulf & destroy pathogens

5. Third Line of Defense: targets specific pathogens
B-cells (WBC): produce antibodies that destroy pathogen
T-cells (WBC): identify pathogens & distinguish one kind from another
Antibodies – destroys
Specific antigens

6. HIV
Human immunodeficiency virus

7. AIDS
Acquired Immune Deficiency Syndrome
What do you currently know?

8. Passive Immunity: antibodies come from another source (i. e
Passive Immunity: antibodies come from another source (i.e. mother – newborn baby)
Active Immunity: You produce your own antibodies by:
Having a disease i.e. chicken pox
Getting a vaccine i.e. polio, chicken pox etc.

9. Vaccine: consists of dead or weakened pathogens; they trigger an immune response; body produces antibodies against that disease

10. Activities Part One – go to edusolution.com
Choose “test yourself”. Then choose “LE by topics”. Then practice the Regents questions on “Homeostasis”.
Part Two – Create your own PowerPoint by Groups! (See attached)