Across
- 3. A substance that helps the body build immunity to a disease by introducing a harmless form of the pathogen.
- 5. describes diseases spread through contact with blood
- 8. The liquid part of blood that carries cells, nutrients and waste
- 10. The ability of the body to resist infection or disease, often because of antibodies or previous exposure.
- 11. The way a disease spreads from one person or organism to another.
- 12. Describes diseases or particles that spread through the air, often by coughing or sneezing.
- 13. Human body temperature
- 15. A process where microorganisms like yeast break down sugars without oxygen
Down
- 1. Helps to digest food and kill harmful microoganisms
- 2. A process where certain white blood cells surround and digest harmful microbes.
- 4. A protein made by the immune system that helps fight infections by attaching to harmful microbes.
- 6. Small cell fragments in blood that help form clots to stop bleeding.
- 7. substance (often on a microbe) that triggers an immune response in the body.
- 9. A tiny infectious agent that can only reproduce inside living cells.
- 14. Human Immunodeficiency Virus – a virus that attacks the immune system and can lead to AIDS.