Across
- 3. how big the outside of objects are
- 5. feed their babies
- 6. The rule for size
- 7. a long soft tube where food gets digested
- 8. tiny units in your body
- 9. we need this to live and function
Down
- 1. inflate when we breathe
- 2. the sets of rules that explain shapes and objects
- 4. tiny pieces that make up a larger thing
- 7. fish need this to breathe