Circulatory System

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Across
  1. 4. Muscular organ about the size of a fist, pumps blood throughout the circulatory system.
  2. 5. Organ that fills with oxygen and dispels carbon dioxide.
  3. 8. Returns blood to the heart from the upper body.
  4. 9. Bottom two chambers of the heart.
  5. 13. The lungs remove this from the blood.
  6. 14. Carry carbon dioxide and waste towards the heart.
  7. 15. This system works with the circulatory system tell the heart to beat.
  8. 16. Large vein carrying deoxygenated blood back to the heart.
Down
  1. 1. The amount of blood in the average adult body.
  2. 2. Tiny blood vessles connecting the arteries and veins.
  3. 3. Returns blood to the heart from the lower body.
  4. 6. Control the flow of blood through the heart by opening and closing during contractions.
  5. 7. Carry oxygen and nutrients away from the heart to the body.
  6. 10. Capillaries ____ arteris and veins.
  7. 11. The lungs add this to the blood.
  8. 12. This is transported throughout the body by the arteries and veins.
  9. 17. Main artery of the heart carrying oxygenated blood to the body.
  10. 18. Top two chambers of the heart.