Electron microscopy of the human eccrine sweat gland with special reference to the folding of plasma membrane
Infoldings of basal plasma membrane which were found in kidney tubules and other various epithelial cells (1–8) have been postulated as a special device concerning the active transport of water (6, 7). It is expected that this special structure may occur in cells of the sweat gland, which is comparable to the kidney in function that a great deal of water is excreted. We previously found basal infoldings in eccrine sweat glands of the pig (carpal organ) (9). The eccrine sweat glands in human axillary skin were observed at this work and more highly developed infoldings were found. These results may be a strong evidence to support the theory that the basal infoldings play a role in the water transport as claimed by Pease (6) and Ruska et al. (7).
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