. Human physiology. the existence of occasional blind extremities of the tubuli uriniferi—the result probably, he thinks, of arrested developement—states, thathe has never seen the ducts terminatein this way. He has described afibro-areolar framework, which, per-vading every part of the gland, andparticularly its cortical portion, per-forms the same office in the kidneyas the capsule of Glisson does inthe liver,—being a basis of supportto the delicate structure of the gland,conducting the bloodvessels throughthe organ, and constituting smallchambers in the cortical portion, ineach of which a s
. Human physiology. the existence of occasional blind extremities of the tubuli uriniferi—the result probably, he thinks, of arrested developement—states, thathe has never seen the ducts terminatein this way. He has described afibro-areolar framework, which, per-vading every part of the gland, andparticularly its cortical portion, per-forms the same office in the kidneyas the capsule of Glisson does inthe liver,—being a basis of supportto the delicate structure of the gland,conducting the bloodvessels throughthe organ, and constituting smallchambers in the cortical portion, ineach of which a single ultimate coilor loop of the uriniferous ducts islodged. Mr. Goodsir believes, thatthe urine is formed at first within theepithelium cells of the ducts, and thatthese burst, dissolve, and throw outtheir contents, and are succeeded byothers, which perform the same func-tions. The urine of man has notbeen detected by Mr. Goodsir withinthe cells, that line the ducts, but he has submitted to the Royal Society. Tubuli Uriniferi. A. Portion of a secreting canal from the cor-tical substance of the kidney, b. The epithe-lium or gland-cells, more highly magnified (700times), c. Portion of a canal from tho medul-lary substance of the kidney. At one part thebasement membrane has no epithelium lining it. Lond. and Edinb. Monthly Journ. of Med. Science, May, 1842. 556 SECRETION Fis:. ISO. of Eclinburgli a memoir, already referred to, in which he has endea-voured to show, that urine, bile, and milk, as well as the other moreimportant secretions in the lower animals, are formed within thenucleated cells of the ducts themselves; and he is of opinion, that theurine of man is poured at first into the cavities of the nucleated cellsof the human kidney. Mr. Bowman^ describes the kidney as furnished with a true portalsystem, and is of opinion that the urine, like the bile, is secreted—inpart at least—from blood, traversing a second set of capillaries. Accord-ing to him, each of the e
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