Question

How do substances like co2 and water move in an outer cell

Answer 1

The water and co2 move in out of cell by the process of osmosis or diffusion

Answer 2

Here's your answer looking for

The substance like carbon dioxide and water moves to the outer shell by the process of osmosis.
Or,
By the process of Exo osmosis.

Here the water or Carbon dioxide travels from higher concentration to lower concentration.
Outside of the cell there is low concentration of water and carbon dioxide that's why carbon dioxide and water travels from her concentration to lower concentration and moves out wards or outer part of the cell.

Hope you are satisfied with my answer