The Circulatory System

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Across
  1. 1. These blood vessels have valves in them to stop blood flowing backwards
  2. 2. The energy source for respiration
  3. 3. Blood vessel that leaves the heart taking blood to the body.
  4. 7. Blood vessel where the exchange of materials takes place
  5. 10. The gas produced by respiration
  6. 11. Carries deoxygenated blood from the heart to the lungs
  7. 12. Part of the heart that pumps blood around the body (4,9)
  8. 13. The cells that transport oxygen around the body (3,5,5)
  9. 15. A product of respiration
Down
  1. 1. Brings deoxygenated blood back to the heart from the body (4,4)
  2. 4. Carries oxygenated blood from the lungs to the heart.
  3. 5. Part of the heart that pumps blood around the lungs (5,9)
  4. 6. Carries blood away from the heart
  5. 7. A fatty substance that can block blood vessels leading to heart disease
  6. 8. The cells that fight infection (5,5,5)
  7. 9. Carries blood to the heart
  8. 14. The gas required by respiration