When turgidity increases within the two guard cells flanking each stomatal aperture or pore, the thin outer walls bulge out and force the inner walls into a crescent shape. The opening of the stoma is also aided due to the orientation of the microfibrils in the cell walls of the guard cells.

When turgidity increases within the two guard cells the opening of?

When turgidity increases within the two guard cells and opening of each stomatal aperture or pore occurs.

When the turgidity increases within the 2 guard cells the stomata?

When the two guard cells are turgid (swollen with water), the stoma is open, and, when the two guard cells are flaccid, it is closed.