| A | B |
|---|
| Immune System | The body's defense against disease causing organisms |
| First Line of Defense | Skin and reflexes (sneezing, coughing) |
| Second Line of Defense | Inflammatory Response (area becomes red, swollen, and warm to touch) |
| Inflammatory Response | Increasing blood supply to the affected area which allows more white blood cells in the area |
| Interferon | A substance produced by cells when they are attacked by viruses. It slows the rate of virus reproduction. |
| Third Line of Defense | Produce antibodies |
| Antibodies | Proteins made by the immune system that destroy invaders |
| Antigen | An organism that invades the body and triggers antibodies to start working. |
