Across
- 1. Direct transmission occurs in which of the following ways?
- 4. An infection that is located in a small
- 6. one-celled micro-organisms
- 7. A virus that attacks and destroys the infection-fighting cells of the immune system is called:
- 8. What type of contagious virus can show up as a cold sore?
- 9. The inner layer of the two main layers of the skin
Down
- 2. the outermost layer of skin on your body
- 3. What are produced by the immune system to either destroy, kill or inactivate pathogens?
- 5. What type of slime is created when a bacterial colony and water are present?