| A | B |
|---|
| cilia | hairlike structures that line the respiratory system |
| macrophages | white blood cells |
| antibodies | proteins tailored to attach themselves to invaders and destroy thememselves |
| vaccine | a substance containing killed or weakened organisms that cause the body to be immune to a disease |
| immunity | a built in resistance to an organsim or disease |
| pathogens | disease causing microorganisms |
| virus | a chemical particle that can multiply when it is inside a cell |
| allergy | an overreaction of the immune system to a normally harmless substance |
| HIV | the virus that causes AIDS |
| interleukins | one kind of interleukin that causes T cells to grow and reproduce |
