Across
- 5. the primary muscular organ that pumps blood through the body
- 7. A double-layered membrane surrounding the heart.
- 9. Aorta
- 10. Return deoxygenated blood to the heart
Down
- 1. pulse
- 2. carry oxygenated blood away from the heart
- 3. muscle
- 4. Tiny vessels connecting arteries and veins, where nutrient/gas
- 6. blood clot
- 8. heart