A-LevelBiologyGas exchangeMay/June 2022Paper 2 Q56 Marks
Fig. 5.1 is a photomicrograph of a transverse section through part of the bronchus of the human gas exchange system. The image is of a good resolution for a light microscope. The bronchial epithelium is a single layer of cells lining the lumen of the bronchus. [Figure 5.1]
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