Lectures on renal & urinary diseases / by Robert Saundby.

  • Saundby, Robert, 1849-1918.
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: Lectures on renal & urinary diseases / by Robert Saundby. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    a pyramid, is joined by others and opens on the surface of the apex of a papilla. The convoluted tubules are lined by a large granular epi- thelium arranged in a single layer. The cells are composed of two parts, an inner containing a spherical nucleus, and an outer part which has a fibrillated appearance from the rods placed at right angles to the axis of the of presence tube. The cells appear continuous, no separation between them being ordinarily visible, adjacent cells interlocking by tooth- like projections on their surfaces. Similar epithelium is found in the spiral tubule, and the ascending limb of Henle's loop. In the descending limb the epithelium is clear and flattened with a bulging nucleus. In the irregular tubule the cells somewhat resemble those of the convoluted tubes, but they are shorter, the nuclei are oval and the rods are coarser and better defined. The collecting tubes are lined by large clear cubical or columnar epithelium with distinct nuclei. MalpigJiian bodies are small spherical structures composed of Bowman's capsules, already alluded to, which enclose capillary tufts, and are pierced by affej-ent and efferent vessels. They are situated upon the extremities of horizontal branches of the interlobular arteries, and are about 250 of an inch in diameter. Within the capsule each afferent vessel breaks up to form a capillary tuft, an arrangement of vascular loops supported by connective tissue and covered by a layer of endothelium {^Fig. 2, GL). The inner surface of the cap- sule is likewise covered by a lining of flattened cells, which are continuous with and prob- Tu,. 2.--Diagram of arrangement ot blood Vfs- ably mOcHficationS of thctubular sels in the renal cortex (after Tyson). )?i, region / of the medullary ray ; b.regionof the convoluted pnitllpllllTTl tubules; VI, interlobular vein ; AI, interlobular '-1^^'-^^^^^ ^^^• artery; VA.vas afEerens; VE, vas efferens; GL. T^Jnnrl ■7;/?er/?/<' Thp- rpnpl Bowman's capsule containing capillary tuft; VZ, J-JLUULV ai^ctot-l-J. J. lli„ iv^iidi venous radicle of interlobular vein. artcry as it cHters the hllum divides into four or five branches, which are invested by sheaths derived from the fibrous capsule. They pass in-