Across
- 3. – Tiny blood vessels where gas exchange occurs.
- 5. – Carries blood towards the heart.
- 8. – Carries blood away from the heart.
- 10. – The gas that red blood cells transport to tissues.
- 11. – The movement of blood around the body.
Down
- 1. – The protein in red blood cells that carries oxygen.
- 2. – Structures in the heart and veins that prevent backflow of blood.
- 4. – The rhythmic throbbing caused by blood being pumped through arteries.
- 5. – The lower chambers of the heart.
- 6. – The muscular organ that pumps blood around the body.
- 7. – The arteries that supply blood to the heart muscle.
- 9. – The upper chambers of the heart.