Structure of leaves 4.0 / 5 based on 1 rating ? BiologyCells, tissues and organsGCSEAQA Created by: EmmaCreated on: 07-05-13 17:14 What do the structures of leaves do? They let gases diffuse in and out of cells 1 of 8 Where does CO2 diffuse into the leaf? It diffuses into the air spaces and then into the cells where photosynthesis happens 2 of 8 What is the underneath of a leaf? It is an exchange surface, covered in stomata which the CO2 diffuses through 3 of 8 Where do oxygen and water vapour diffuse from? They also diffuse from the stomata (water vapour is also lost from all the leafs surface) 4 of 8 What is the size of the stomata controlled by? They are controlled by the guard cells, they close the stomata if the plan is losing water faster than its being replaced 5 of 8 What shape is a leaf? It is a flattened shape which increases the area of the exchange surface 6 of 8 What also forms another exchange surface? Walls of the cells inside the leaf, the air spaces inside the leaf increase the area to increase the chance of CO2 getting in the cells 7 of 8 How does water vapour escape from the leaf? It evaporates from the cells inside the leaf, by diffusion because the concentration is high inside the leaf and lower outside 8 of 8
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