plants and photosynthis

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  • Created by: doughty
  • Created on: 15-05-12 05:29

Remember that the equation for photosynthesis is:

carbon dioxide + water (+ light energy)glucose + oxygen

Let's see how plants get the carbon dioxide and water they need for this process.

Carbon dioxide

Plants get carbon dioxide from the air through their leaves. The carbon dioxide diffuses through small holes in the underside of the leaf called stomata. (One of these holes is called a stoma. The plural is stomata.)

Shows how the leaf is structured: Upper layer, palisade layer, spongy layer, lower layer. Sunlight hits the upper layer. Gases are exchanged through the stoma in the lower layer (

The lower part of the leaf has loose-fitting cells, to allow carbon dioxide to reach the other cells in the leaf. This also allow the oxygen produced in photosynthesis to leave the leaf easily.


A leaf usually has a large surface area, so that it can absorb a lot of…


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