Across
- 4. Gel-like masses that manage bleeding
- 6. The longest, strongest bone in your body?
- 7. What side does blood come into?
- 10. The central organs of the respiratory system?
- 11. Blood vessels that carry oxygen-poor blood to heart?
- 12. One symptom of a heart attack?
Down
- 1. What has 4 main components?
- 2. Blood vessels that bring blood from the heart?
- 3. What is made in our bone marrow?
- 5. The most complex part of the human body?
- 8. Your upper arm bone?
- 9. 55% of our blood is what?