The pores in the surface of a leaf that allow gases in and out are called stomata.

Quick Scoop

Stomata are tiny openings mainly found on the leaf’s surface that let carbon dioxide enter for photosynthesis and allow oxygen and water vapour to leave the plant. Each stoma (single of stomata) is flanked by two guard cells that change shape to open or close the pore, helping the plant control gas exchange and water loss.

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