Topics of this game:
- body system that transports molecules to and from cells
- oxygen, glucose, carbon dioxide, and others
- blood vessels (arteries, veins, capillaries), blood, and heart
- blood in the body
- oxygen and nutrients to cells
- waste and carbon dioxide
- never rests
- the sound of valves closing
- four
- Left side
- Right side
- arteries and veins
- carry blood away from the heart
- carry blood to the heart
- tiny blood vessels
- sends blood cells to individual cells
- Dark red
- Bright red
- Carbon dioxide
- Oxygen
- NO
