the respiratory and circulatory systems

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Across
  1. 4. carries deoxygenated blood to the lungs from the heart
  2. 7. the thickest part of the heart that pumps oxygenated blood into the aorta.
  3. 9. a muscular pump that pushes blood around the body.
  4. 10. a waste gas produced by cells.
  5. 11. a blood vessel that transports blood from the lungs to the heart
  6. 12. carry blood towards the heart.
Down
  1. 1. an artery that carries oxygenated blood to the cells of the body.
  2. 2. 2 large veins that carry carbon dioxide rich blood from the body cells to the heart.
  3. 3. a chemical reaction that occurs inside cells that produces energy.
  4. 5. a part of the heart that receives carbon dioxide rich blood from the body cells.
  5. 6. a sugar that is used for cellular respiration.
  6. 8. carry blood away from the heart.