biology

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Across
  1. 4. what you do when you walk
  2. 6. when you make copies of your self
  3. 7. when you feel something in your surroundings
Down
  1. 1. when you get rid of waste
  2. 2. when you release energy from food
  3. 3. when you eat nutrients
  4. 5. when you get taller or bigger