Cheek squamous epithelial cells. Differential interference contrast (DIC) light microscopy footage of cheek cells scraped from the the inner surface of a person's mouth. These squamous epithelial cells are thin and flat and several layers thick, making the lining of the cheek smooth, flexible and strong. The cell membrane, cell nucleus and the cell's organelles are clearly visible. Magnification: x900 when printed at 10 centimetres across.