Across
- 4. the scientific name is O2
- 6. system breaks down food
- 7. delicate blood vessels
- 12. biggest and longest artery
- 13. theres a left and right thin walled chambers that recieve blood from veins
- 15. a instrument that is used to easily cut open the heart
- 16. system that processes to get rid of unwanted products
- 18. system made of blood vessels and carries blood away and to heart
- 19. basic blocks of all living things
Down
- 1. carry air into your lungs
- 2. cleanse the blood of toxins and turns it into urine
- 3. is the subject
- 5. a muscle that allows the lungs to expand
- 8. system includes nose, mouth, throat
- 9. an organ that is the size of your fist that pumps blood
- 10. something that allows you to think
- 11. a pair of spongy air filled organs placed on both sides of your chest
- 14. tiny air sacs at the end of the bronchioles
- 17. an oxide that carries atoms of oxygen