Across
- 4. the system that moves oxygen and nutrients through our blood vessels
- 5. blood vessel that carries blood away from the heart
- 7. major organ involved in the respiratory system
Down
- 1. blood vessel that carries blood back to the heart
- 2. a muscular organ that pumps blood throughout the body
- 3. what we breathe in
- 6. the system that moves fresh air into our bodies and releases waste gases