Across
- 3. living things used them to breathe.
- 5. to succeed.
- 7. to fill again
- 10. red liquid formed by plasma and blood cells.
- 11. tiny tube that carries blood.
- 13. group of things that work together
- 14. humorous imitation.
Down
- 1. to walk slowly.
- 2. both of the small, hollow spaces inside of the hear.
- 4. sure to happen.
- 5. related to the lungs.
- 6. a room
- 8. organ that pumps blood.
- 9. carry blood from the body to the heart
- 12. carries blood from the heart to the body.