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