| A | B |
|---|
| B cell/Plasma Cell | makes antibodies specific to one type of pathogen |
| T cell/Killer T Cell | kills infected cells |
| T Helper Cell | activates other immune cells to divide and attack pathogens |
| Macrophage | white blood cell that attacks and eats pathogens |
| lymph node | lumps of tissue that filter out pathogens from the bloodstream |
| pathogen | something that causes disease (ex. virus, bacteria, fungus, preon) |
| virus | disease causing agent made of DNA or RNA in a protein shell |
| antigen | a small part of a pathogen |
