Across
- 3. disease where your bones becomes weaker.
- 4. the organ that pumps blood.
- 6. injury to the brain caused by a big hit to the head.
- 8. the urinary system removes liquid wastes from this.
- 9. substances in food that our body needs.
- 10. the largest organization of the body.
- 12. 55 percent of the blood is made up of this.
Down
- 1. blood is brought back to the heart with these vessels.
- 2. how many liters of blood in the body.
- 5. the system responsible for bringing oxygen into the body.
- 7. where 2 or more bones connect.
- 8. part of the nervous system.
- 11. long tube from your mouth to your stomach.