Circulatory System

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Across
  1. 2. prevent backward flow of blood in the heart
  2. 7. thin walled upper heart chambers which receive blood and pump blood to the ventricles
  3. 8. Most Numerous
  4. 10. muscular thick-walled lower chambers which pump blood from the heart
Down
  1. 1. Acts as a pump to move blood around your body
  2. 3. Carry blood toward the heart
  3. 4. Connect arteries to veins
  4. 5. Carry blood away from the heart
  5. 6. delivers nutrients and oxygen to all cells in the body
  6. 9. muscular central wall dividing heart into two halves, prevents oxygen-rich and oxygen-poor blood from mixing