In a region polluted by sulfur dioxide gas (SO2), we Number of hospitalized patients per day noticed that the number of hospitalized patients for respiratory difficulties varies with the content of 112 SO, in air, document 1. 1- Represent, in the form of a table, the variation of the number of hospitalized patients in function of 110 the quantity of sulfur dioxide in air. 2- Analyze the graph of document 1. What do conclude? 111 109 you 108 107 106 2 14 Quantity of So, in air (mg/m²) 10 Document 1 Document 2 shows the aspect of the bronchi of a healthy individual A and of another individual B who lives in this region polluted by SO2. 3- Compare the aspect of the bronchi of these two individuals, document 2. Derive the effect of sulfur dioxide on the bronchi and its consequence on respiration. lumen wall Individual A Individual B

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