Across
- 2. protects and supports body organs
- 6. allows locomotion
- 9. production of offspring
- 11. part of the respiratory system
- 12. part of the skeletal system
- 13. part of the digestive system
- 14. transports materials in body via blood pumped by the heart
- 15. returns fluids to blood vessels
Down
- 1. one of the materials transported through blood
- 3. secretes regulatory hormones
- 4. breaks down food
- 5. activates muscles and glands
- 7. maintains acid- base balance
- 8. forms the external body covering
- 10. keeps blood supplied with oxygen