Gaseous Exchange in Plants

Plants plants and more plants

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  • Gaseous Exchange in Plants
    • Stomata
      • Stomata are small pores found on the lower surface of the leaf.
      • The Stomata allow  exchange of gases between the  atmosphere and the internal tissues of the leaf.
      • Water also evaporates from a plant through the Stomata which links to Transpiration.
      • Plants wilt if they lose too much water.
        • Since light hits the upper surface of the leaf, confining Stomata to the lower surface reduces water loss.
      • Stomata closes at night to help reduce the pointles loss of water.
      • Guard cells are unusual in having chloroplasts and unevenly thickened walls, with the inner wall being thick and the outer wall being thin.
      • Image of Stomata:


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