Across
- 3. Both air and food go through here
- 4. What keeps the trachea open
- 5. Makes blood cells and is in spongy bone
- 8. Contains blood vessels, lymphatic vessels, and nerve fibers
- 10. The shaft of a long bone
- 11. To breath
- 12. Muscles between the ribs
- 14. What is contained in the medullary cavity
- 16. The production of blood cells
- 18. The ends of a long bone
- 19. Distinct units in compact bone
- 21. Tiny chambers that contain cells
Down
- 1. Gas required for ATP production
- 2. Occurs between capillaries and alveoli
- 6. Hair-like structures that allow bone cells to communicate
- 7. Parachute shaped muscular membrane at the bottom of the thoracic cavity
- 9. Calcium and this mineral are stored in bones
- 13. The voice box
- 15. Fibrous connective tissue covering long bones
- 17. Bone cell
- 20. Only external part of the respiratory system