Cells, cells, and more cells

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Across
  1. 3. works with ER
  2. 4. ATP stands for
  3. 5. the outside of a cell
  4. 9. all organelles are within it
Down
  1. 1. called "brain of cell"
  2. 2. produces ATP
  3. 6. collect waste
  4. 7. producers of proteins
  5. 8. abbreviated as ER