The Human Circulatory System

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Across
  1. 3. Oxygen-carrying protein found in red blood cells
  2. 4. Which system works closely with the circulatory system to drain excess fluid?
  3. 7. What you might feel when the heart’s ventricles contract
  4. 8. Structure responsible for maintaining one-way flow in heart chambers
  5. 11. The organ that pumps blood through the body
  6. 12. A low white blood cell count can lead to weaken ___
Down
  1. 1. Which one has valves to prevent backflow?
  2. 2. The fluid portion of blood that transports nutrients and hormones
  3. 5. This valve prevents backflow of blood from the right ventricle to the right atrium
  4. 6. What would be the consequence of low platelet count?
  5. 9. The largest blood vessel in the body
  6. 10. The number of chambers in the human heart