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?

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

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

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

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

HIV Human immunodeficiency virus

AIDS Acquired Immune Deficiency Syndrome What do you currently know?

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.

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

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)