Histology of swiflet kidney.

Ruzaidi, Raihan Adnin (2015) Histology of swiflet kidney. [Project Paper] (Submitted)

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Abstract

The kidney of the swiftlet is surrounded by a very thin layer of connective tissue which penetrate the kidney parenchyma to divide the kidney into a number of lobules. Each lobule comprised of the cortex, medulla and pelvis. The structure of the nephron in the swiftlet which is the functional unit of the kidney, is markedly different from that of mammal and is also different from that of some avian species namely the chicken and dove. In a cross section of the kidney lobule of the swiftlet, the renal corpuscle is arranged in a row close to cortico-medullary junction. The major part of the cortex is occupied by the proximal convoluted tubules which are arranged in parallel rows traversing the thickness of the cortex. Terminating at the cortico-medullary junction the proximal convoluted tubule continued a short distance into the medulla as the distal convoluted tubule lined by simple cuboidal epithelium resembling the epithelium of the descending and ascending limbs of loop of Henle of mammalian species. The loop of Henle is however absent as no tubules lined by simple squamous epithelium which normally line the loop of Henle could be observed. Hence the nephron of the swiftlet is loopless and based on its structural organization, the nephron could be classified as the reptilian type. The distal convoluted tubule in the medulla continued a short distance into the cortex to pass close to the renal corpuscle to form the macula densa which is one of the components of the juxtaglomerular apparatus. The distal convoluted tubule which extend a short distance into the cortex could be the rationale for the renal corpuscle to lie close to the cortico-medullary junction. The convoluted tubules then continue to form the collecting ducts located in the pelvis of the kidney. It can be concluded from this study that the kidney of the swiftlet is simple yet an efficient filtration organ – simple from the point of view that the distal convoluted tubule is very short and without the loop of Henle; it is highly efficient brought about by the very long proximal convoluted tubule which provide a very wide surface area for reabsorption at the glomerular filtrate.

Item Type:	Project Paper
Faculty:	Faculty of Veterinary Medicine
Depositing User:	Ms Siti Mariam Giman
Date Deposited:	21 Nov 2022 07:25
Last Modified:	21 Nov 2022 07:25
URI:	http://psaspb.upm.edu.my/id/eprint/408

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