Across
- 6. composed of the skin, hair and glands associated with the skin
- 7. secrete into body cavities or onto surfaces through ducts
- 8. system which protects the body from infection
- 9. chemical molecules which travel through the blood to affect body systems
Down
- 1. oil glands
- 2. control of the body temperature
- 3. white blood cell
- 4. weakened or killed antigen which when injected promotes immunity
- 5. foreign particle in the body