Across
- 2. Liquid portion of blood
- 5. Blood vessels leading away from the heart
- 6. Pumps the blood
- 7. Blood vessels delivering oxygen to the body cells
- 9. Keep blood flowing in the proper direction
- 11. Blood vessels returning to the heart
Down
- 1. Nerve that slows down heart
- 3. Large artery in body
- 4. Two lower chambers of the heart
- 8. Two upper chambers of the heart
- 10. Muscular wall that separates heart from right and left side