The shape of rat kidney tubular cells

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Abstract
Many cells specialized for ion transport have complex shapes. The cells of the nephron are no exception. Besides the well‐documented lateral processes seen in the basal region of many tubular cells, two further specializations are found in rat kidney tubular cells which serve to increase the lateral cell membrane area. These are an interdigitation of processes confined to the apical region, and an inter‐digitation of more extensive processes that extend the full height of the cell.