Anatomy of the Kidneys of a Newly Born Pigmy Hippopotamus (Choeropsis liberiensis Morton)

Maluf, N.S.R.

doi:10.1111/j.1439-0264.1978.tb00492.x

Cited by 7 publications

(11 citation statements)

References 23 publications

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“…These papillae can be associated with a tubus maximus, which is "a supreme collecting duct lined by collecting duct epithelium, with no definitive wall and into which terminal collecting ducts open around. Thus the term is applicable to the cephalic and caudal extensions of the diminutive renal pelvis of the Equidae and Hippopotamidae, to the lobar branches of these extensions in the Hippopotamidae (Maluf, 1978(Maluf, , 1994b, and to the re-ceptacles of the terminal collecting ducts in every lobe of the Rhinocerotidae" (Maluf, 1987(Maluf, , 1989c(Maluf, , 1991a.…”

Section: Discussionmentioning

confidence: 99%

Kidney of elephants

Maluf

1995

Anat. Rec.

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Section: Discussionmentioning

confidence: 99%

Kidney of elephants

Maluf

1995

Anat. Rec.

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“…Maluf, 1978). In the 7-week-old okapi there is no such zone, but the peripheral glomeruli are smaller than the juxtamedullary ones.…”

Section: The Juvenile Kidneymentioning

confidence: 96%

“…The first two components may be included under the term pars convoluta proximalis and the third component under pars lata descendens (cf. Maluf, 1978). Change into the narrow descending segment (pars tenuis descendens) is fairly abrupt and, for the long loops, occurs in the inner stripe of the outer medulla.…”

Section: Cortical Medullary Raysmentioning

confidence: 98%

Kidney of a juvenile okapi, Okapia johnstoni

Maluf

1981

Am. J. Anat.

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The kidney of the okapi is of the medullary crest type and is divided transversely into six lobes by encroachments of cortex into medulla. These lobes are demarcated externally by furrows. The collecting ducts open at the apex of the truncated medullary crest. The pelvis part of the kidney, or pars pelvina renis, is the entire inner medulla and is the only part exposed to the pelvic urine. The pelvis has 10 interlobar vascular eminences and extends peripherally along-side the interlobar vessels as 10 fornices. The vascular eminences are buttressed by 12 free-edged semilunar eminences, which form pouches across 12 intervascular eminences. At each pole a vascular eminence supplies blood vessels to a dorsal and a ventral intervascular eminence. The extrahilar portion of the renal vein consists mainly of a thick coat of longitudinal muscle. In the renal sinus this heavy muscular coat is absent. The tributaries of this vein open via conspicuous nonmuscular valves. The cortex is about 85% of the renal mass and has about 2.89 X 10(6) glomeruli, which form 4.85% of the cortical mass. The filtering surface of a glomerulus is 0.088 mm2, making the total filtering surface of one kidney 0.219 m2. The number of glomeruli per kidney falls into the line which relates number of glomeruli to adult body weight from mouse to elephant and is expressed by log N = 0.59 log W + 3.2 or by N - 1.585W0.59 where N is the number of glomeruli in one kidney and W the adult body weight.

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“…The kidneys of the 12-hour term neonate (No. 5547) have been described (Maluf, 1978) and are included here for comparison. The 2-day-old term neonate (No.…”

Section: Methodsmentioning

confidence: 99%

“…Thirteen years have passed since the initial detailed report on the renal anatomy of a very newly born Choeropsis liberiensis (MALUF, 1978). The kidney of an adult of this endangered mammal has been acquired ultimately.…”

Section: Introductionmentioning

confidence: 99%

Renal Anatomy of the Pigmy Hippopotamus (Choeropsis liberiensis): An Overview

Maluf¹

1994

Anat Histol Embryol

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The adult kidney of Choeropsis liberiensis is 74.8% cortex and 22.9% medulla. The neonatal cortex is relatively less. A single kidney has about 3 x 10(6) glomeruli. These form 5% of renal mass in the adult but more so in neonates. The primary tubus maximus, TM1, follows the lateral curvature of the kidney. It gives off, toward the hilum, dorso-ventrally paired secondary tubi maximi, TM2. The tubi are a single layer of high cuboidal epithelium from which terminal collecting ducts arise throughout the surrounding inner medulla. The cranial and caudal limbs of TM1 open at a diminutive pelvis which receives a small papilla in continuity with TM1. The medulla is continuous although variably distorted by folds of cortex at the lateral curvature of the kidney. The renal lobes project toward the medial border and consist of cortex, medulla and TM2. The lobar cortex is continuous with the common cortex of the lateral curvature. The kidney, although strongly lobed, has no infundibula or rencules. A main peripheral vein courses medial and parallel to TM1. It is apparently a modified large arcuate vein and receives arcuate and interlobar tributaries. At the level of the papilla it joins the main renal vein. The arterial supply is mainly by interlobar arteries but there are also sizeable external perforator arteries which branch from the main renal artery and perforate the cortex of lobes about the hilum. The source of the arteries is illustrated.

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Anatomy of the Kidneys of a Newly Born Pigmy Hippopotamus (Choeropsis liberiensis Morton)

Cited by 7 publications

References 23 publications

Kidney of elephants

Kidney of elephants

Kidney of a juvenile okapi, Okapia johnstoni

Renal Anatomy of the Pigmy Hippopotamus (Choeropsis liberiensis): An Overview

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