The Crossword Of Life

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Across
  1. 3. it detects changes in the surroundings
  2. 4. it is when you produce energy
  3. 7. when you _ _ _ _ from one place to another
Down
  1. 1. taking in and using food
  2. 2. its to do with babies
  3. 5. getting rid of waste
  4. 6. when you get bigger