"MRSCRGN" = If it's living, being cheeky or zesty 😇😇

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Across
  1. 2. they form our body and we have millions of
  2. 3. The process of becoming bigger
  3. 6. Moving in a different way of writing it
  4. 7. inhaling/breathing
Down
  1. 1. the process of making silly goober babies
  2. 4. food and fuel
  3. 5. you have 5 of them, sight is one of them