Across
- 3. Blood vessels that carry blood to the heart.
- 6. What kind of organ is the heart?
- 7. What is another name for the circulatory system?
- 8. What are the lower chambers called?
- 11. What is located at the top of your heart?
- 12. Is the least common blood type positive or negative?
Down
- 1. Is the most common blood type positive or negative?
- 2. Brings _____ to all your cells.
- 4. What are the top chambers called?
- 5. Blood vessels that carry blood away from the heart.
- 7. ________muscle: muscle found in the heart.
- 9. What are the 4 _____ in a heart called?
- 10. Blood types are determined by your _____.