Cells from the Tubuli Uriniferi
The tubuli uriniferi are composed of a nearly homogeneous membrane, and are lined internally by epithelium. A, Portion of a secreting tubule from the cortical substance of the kidney. B, The epithelial or gland cells.
Baker, W. Morrant & Harris, Vincent Dormer Kirkes' Hand-book of Physiology, 13th ed. (Philadelphia: P. Blakiston's Son & Co., 1892) 415