The kidney of tapirs: a macroscopical study

The Anatomical Record
N S Maluf


The renal cortex of tapirs, water-loving primordial ungulates, was continuous, nonlobed, and about 80% of renal mass in adult and 71% in term-neonate. In the neonates even the peripheral glomeruli were moderately mature. Tapirus bairdi had about 4 million glomeruli per kidney and T. pinchaque about 3 million smaller glomeruli. Number of glomeruli per gm of cortex was 12,444 in T. bairdi and 13,400 in T. pinchaque. Cortical loops were common in the medullary rays. The medulla was the simple crest-type. The terminal collecting ducts (T.C.D.) opened separately at the crest and not into a tubus maximus. The "outer stripe" of the outer medulla apparently was telescoped into the deep cortex. The medullary loops turned at a thick portion and at nearly all levels of the medulla. The medullary crest was lined by urothelium which extended into the ends of the T.C.D. Otherwise the T.C.D. were made of columnar epithelium. The pelvic urothelium was continuous with that of the medullary crest at the dorsal and ventral fornices. The fornices were well within the inner medulla. Hence only inner medulla could be exposed to pelvic urine. The hilar arteries, unlike the other two perissodactyl families (rhinoceri and equids), passed through the co...Continue Reading


Mar 1, 1979·The American Journal of Anatomy·E R Lacy, B Schmidt-Nielsen
Nov 1, 1977·Kidney International·M A KnepperR S Post
Mar 1, 1978·The Journal of Clinical Investigation·E L ChuangJ H Stein
Mar 1, 1991·The American Journal of Anatomy·N S Maluf
Apr 1, 1989·The American Journal of Anatomy·N S Maluf
Dec 1, 1987·The American Journal of Anatomy·N S Maluf
Feb 1, 1987·Kidney International·B Schmidt-Nielsen
Jan 1, 1972·Pflügers Archiv : European journal of physiology·W Schütz, J Schnermann
Jul 1, 1965·The Journal of Cell Biology·R M Hicks
Nov 1, 1984·The Journal of Clinical Investigation·J BargmanR L Jamison
Jan 1, 1982·The Journal of Clinical Investigation·R E OliverR L Jamison
Oct 1, 1980·Kidney International·B Schmidt-NielsenL N Reinking
Jul 1, 1981·The American Journal of Anatomy·N S Maluf
May 1, 1955·The Journal of Urology·N S MALUF

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Sep 1, 1994·Anatomia, histologia, embryologia·N S Maluf
Dec 1, 1993·Journal of Morphology·N S R Maluf
Aug 1, 1995·The Anatomical Record·N S Maluf

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