Across
- 3. Where the blood leaves the heart
- 6. Element that sustains every living thing
- 7. Chamber of the heart that receives the blood
- 9. Middle Cardiac Muscle
- 10. Thick wall separating right and left side of the hear
Down
- 1. Gas that is released when you breathe out
- 2. Contracts to pump blood throughout the body
- 4. Inner layer of the heart
- 5. Tubular vessel that carries blood from capillaries to the heart
- 8. Rest above the diaphragm and are a respiratory organ allowing for breathing
- 11. Layer around the heart