Electron micrograph of a sebaceous gland. Basal cells (1) close to the connective tissue (CT) are small and undifferentiated. Among these cells are dividing cells, one of which (P) appears to be in early prophase. From this peripheral position the cells move toward the opening of the gland (2 to 4) and produce a fatty secretory product. This oily product is first seen in the cytoplasm as small lipid droplets (5) that gradually fuse (6). The cells perish (7) during the secretion of the secretory product, producing sebum, x6,800. (Courtesy of Dr. Bryce L. Munger.)
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