Across
- 1. they are a type of white blood cells that contain b cells and t cells
- 3. a bacterium, virus, or other microorganism that can cause disease.
- 5. the organs and processes of the body that provide resistance to infection and toxins
Down
- 2. the process where a part of the immune system engulfs an infectious microorganism.
- 3. the first line of defense of your immune system against microorganisms inside the body
- 4. a toxin or other foreign substance which induces an immune response in the body