Immune System
von Kelly King
![Mind Map: Immune System](https://www.mindmeister.com/image/xlarge/112509065/mind-map-immune-system.png)
1. Antigen
2. 2nd Encounter Antigen
3. T Cells
3.1. Cytotoxic T Cells
3.2. Helper T Cells
4. B Cells
4.1. Antibodies
4.1.1. IgM
4.1.2. IgG
4.1.3. Memory Cells
4.1.1. IgM
4.1.2. IgG
4.1.3. Memory Cells