Across
- 2. Composed of the skin, hair and glands associated with the skin
- 6. System which protects the body from infection
- 8. Chemical molecules which travel through the blood to affect body systems
- 9. Weakened or killed antigen which when injected promotes immunity
Down
- 1. Foreign particle in the body
- 3. Control of the body temperature
- 4. Glands, Oil glands
- 5. White blood cell
- 7. Secrete into body cavities or onto surfaces through ducts