Across
- 3. A type of immunity that develops when a person’s immune system responds to a foreign substance or microorganism
- 4. an extremely small piece of organic material that causes disease in humans, animals, and plants
- 6. being, relating to, or belonging to a person or to people as opposed to animals:
- 7. the smallest basic unit of a plant or animal
Down
- 1. a virus that grows and divides inside a bacterium, destroying it
- 2. an organ that tests t cells
- 5. a situation in which you are protected against disease