Across
- 4. Exchanges gases between the air and blood
- 6. Produces eggs and sperm
- 7. Supports sensory receptors
- 11. Eliminates unabsorbed materials
Down
- 1. Defends the body against infection
- 2. Transports substances throughout the body
- 3. Removes wastes from blood
- 5. Stores inorganic salts
- 8. Stimulates muscles and glands
- 9. Controls metabolic activities of the body structure
- 10. Maintains posture