Meet "Poor Benny!" — the body with the unluckiest skin around. Discover the truth behind pimples and what goes in your body. Learn more about:
- T cells, B cells, macrophage, neutrophils, dendritic cells are kinds of white blood cell.
- Immune cells communicate by shape-matching parts of their surface and by sending chemical signals through the blood.
- Immune cells share information about an intruder. Only after sharing this information do they organize an immune response.
- Some T cells can kill an infected cell, some T cells help organize.