Across
- 2. The arteries branch into these smaller vessels
- 4. One-cell thick blood vessels which leak fluid
- 5. Heart muscle
- 8. Carries blood from the heart to the lungs
- 9. Blood enters this organ before going back to the heart
- 10. Wall that divides the heart into two halves
- 11. Blood vessel that carry blood to from the heart
Down
- 1. Lower chambers of the heart
- 3. Keep blood flowing in one direction
- 6. Top two chambers of the heart
- 7. Blood vessels that carry blood away from the heart