Circulatory System

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Across
  1. 2. Organ that fills with oxygen and dispels carbon dioxide
  2. 7. Returns blood to the heart from the lower body
  3. 9. Carry oxygen and nutrients away from the heart to the body
  4. 10. Control the flow of blood through the heart by opening and closing during contractions
  5. 12. Top two chambers of the heart
Down
  1. 1. Tiny blood vessels connecting the arteries and veins
  2. 3. Returns blood to the heart from the upper body
  3. 4. Bottom two chambers of the heart
  4. 5. Large vein carrying deoxygenated blood back to the heart
  5. 6. Muscular organ about the size of a fist, pumps blood throughout the circulatory system
  6. 8. Main artery of the heart carrying oxygenated blood to the body
  7. 11. Carry carbon dioxide and waste towards the heart