- Leukocytes: They look out for dangerous cells
- Antigens: They are substances that trigger an immune response (not cells that invade)
- Pathogens: They are disease-causing agents (not cells that send macrophages and dendritic cells)
- Phagocytes: Consume the invader and the damaged cells
- Lymphocytes: They are two different types of cells (T-cells and B-cells)
- T-cells: They go in search of the bad cells and kill them off
- Helper T-cells: They help activate other immune cells, including B-cells and cytotoxic T-cells
- B-cells: They produce special proteins called antibodies
- Antibodies: They lock on and destroy the invading cells
How do we develop long term immunity?
By T and B cells to identify antigens over time and know how to fight them off if they ever appear.
What are the 3 lines of defense?
First Line: Barriers, such as skin
Second Line: Inflammatory response
Third Line: Immune response
Parent Tip: Review the logic above to help your child master the concept of immunity worksheet answers.
