Volume 2

A textbook of human physiology / by L. Landois ; translated from the 4th German edition, with additions by William Stirling.

  • Landois, L. (Leonard), 1837-1902.
Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: A textbook of human physiology / by L. Landois ; translated from the 4th German edition, with additions by William Stirling. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

    22/696 (page 516)
    [Naked Eye Appearances.—On dividing the kidney longitudinally from the hilum to its outer border, and examining the cut surface with the naked eye, we observe the parenchyma of the kidney, consisting of an outer cortical and an inner medullary, or pyramidal portion, the latter composed of about twelve conical papillae, or Pyramids of Malpighi, with their apices directed towards the pelvis of the organ, and embraced by the calices of the pelvis of the kidney (Fig. 177). The medullary portion is further subdivided into the boundary layer of Ludwig and the papillary portion. According to Klein, the relative proportions of these three parts are—cortex, 3-5 ; boundary layer, 2 -5 ; and papillary portion, 4. The cortex has a light-brown colour, and when torn it presents a slightly granular aspect, with radiating lines running at regular dis- tances. The granules are due to the presence of the Malpighian corpuscles, and the striae to the medullary rays. The boundary zone is darker, and often purplish in colour. It is striated with clear and red lines alternating with opaque ones, the former being blood-vessels and the latter uriniferous tubules. The papillary zone is nearly white and Longitudinal section of a kidney (Tyson, modified from Ludwig)—PF, pyramids of Ferrein; RA, branch of renal artery; RY, lumen of a renal vein receiving an interlobular vein; VR, vasa recta; PA, apex of a renal papilla ; b, b, embrace the bases of the renal lobules.