A treatise on Bright's disease and diabetes with especial reference to pathology and therapeutics / by James Tyson ; including a section on retinitis in Bright's disease by William F. Norris.

Date:: 1881

Credit: A treatise on Bright's disease and diabetes with especial reference to pathology and therapeutics / by James Tyson ; including a section on retinitis in Bright's disease by William F. Norris. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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$vide, but distribute their branches in a manner presently to be described. With these exceptions, the capillaries from all the neighboring efferent vessels communicate with each other, and the whole cortex becomes interpenetrated, as is well shown in Figs. 16 and 18. The meshes of the resulting network sur- rounding the convoluted tubules are small and nearly round, while those embracing the medullary rays are larger and wider. According to Ludwig, the vessels are not closely applied to the tubules, but lacuniforin spaces, frequently filled with fluid, in- tervene between the two. The terminal branches of the interlobular arteries reach the capsule of the kidney. That part of the network which surrounds the medullary rays is continuous with the capillary system of the medulla, but the blood from the cortical plexus is, for the most part, collected by a system of veins (vi, Fig. 18) corresponding to the interlobular arteries. Some of these, at least, begin on the surface of the kidney by the union of a number of minute veins from the external layers of the cortex, which unite iu a radial manner, so that the resulting vessels are called stellate veins (see Fig. 18, w). Thence they descend, each vein in company with an interlobular artery, towards the marginal layer of the medulla receiving numerous branches from the capillaries of the cortical plexus above described. The interlobular veins which do not begin in the stellate veins of the periphery begin in the labyrinth The interlobular arteries, with their afferent branches and the glomeruli may be compared to a bunch of ripe currants, the interlobular vessel corresponding to the vertical stem of the raceme, the afferent vessels to the lateral branches, while the currant itself is the red glomerulus or capillary ball The Vasa Recta and the Bloodvessels of the Medulla.-It was stated on p. 33 that not all the vasa efferentia split up into the capillary system described, but that a certain number lying adjacent to the medulla distribute their branches differently sW ofT \T d0W ***** int0 the -edulla, in the h I of straight vessels, comparable in their distribution to -booing ran h 0 ;hc wi]Iow„treej and are callwl recto Butalthough straights, they are noiarW, though sometimes called arterial*, since they arc without circular mus-$