The Heart

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Across
  1. 4. protect your heart
  2. 7. carry blood that is full of oxygen away from the heart
  3. 8. your heart ________ to push blood around your body
  4. 10. your heart has to work ______ to keep blood moving
  5. 11. your heart has 4 spaces called
Down
  1. 1. your heart _____ blood around your body
  2. 2. take the blood to your heart
  3. 3. your heart's main job is to deliver this to all the cells in your body
  4. 5. are the small thin tubes that carry and deliver blood
  5. 6. the heart is part of this system
  6. 9. these control the flow of blood in your heart