Across
- 4. What your body makes after your stomach breaks your meal into tiny bits
- 5. The red liquid that carries oxygen and nutrients around you
- 6. Tiny and big tubes that carry blood all through your body
Down
- 1. The gas you breathe out
- 2. The pump inside your chest that pushes blood around your body
- 3. Two spongy organs that fill with air when you breathe
- 7. The gas you breathe in that helps your body make energy