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Science 15 March 1985:
Vol. 227. no. 4692, pp. 1351 - 1354
DOI: 10.1126/science.3975620
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Articles

Science, Vol 227, Issue 4692, 1351-1354
Copyright © 1985 by American Association for the Advancement of Science

articles

A renal countercurrent system in marine elasmobranch fish: a computer-assisted reconstruction

ER Lacy, E Reak, DS Schlusselberg, WK Smith, and DJ Woodward

Computer-aided techniques were used to reconstruct the complex renal tubular system in the dorsal kidney region of a marine elasmobranch fish, the little skate (Raja erinacea), from a series of light micrographs of serial sections. It was established that five individual segments of one nephron, consisting of two loops and a distal tubule, are arranged in parallel within an elongated closed tissue sac. Capillaries, which form a network around these nephron segments, enter and exit this sac at the same end. This anatomical arrangement suggests that a complex renal countercurrent multiplier system may be important in fluid regulation in these fish.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Cloning and functional characterization of a second urea transporter from the kidney of the Atlantic stingray, Dasyatis sabina.
M. G. Janech, W. R. Fitzgibbon, M. W. Nowak, D. H. Miller, R. V. Paul, and D. W. Ploth (2006)
Am J Physiol Regulatory Integrative Comp Physiol 291, R844-R853
   Abstract »    Full Text »    PDF »
Regulation of a renal urea transporter with reduced salinity in a marine elasmobranch, Raja erinacea.
R. L. Morgan, J. S. Ballantyne, and P. A. Wright (2003)
J. Exp. Biol. 206, 3285-3292
   Abstract »    Full Text »    PDF »
Molecular and functional characterization of a urea transporter from the kidney of the Atlantic stingray.
M. G. Janech, W. R. Fitzgibbon, R. Chen, M. W. Nowak, D. H. Miller, R. V. Paul, and D. W. Ploth (2003)
Am J Physiol Renal Physiol 284, F996-F1005
   Abstract »    Full Text »    PDF »
Eel urea transporter is localized to chloride cells and is salinity dependent.
A. C. Mistry, S. Honda, T. Hirata, A. Kato, and S. Hirose (2001)
Am J Physiol Regulatory Integrative Comp Physiol 281, R1594-R1604
   Abstract »    Full Text »    PDF »
Molecular characterization of an elasmobranch urea transporter.
C. P. Smith and P. A. Wright (1999)
Am J Physiol Regulatory Integrative Comp Physiol 276, R622-R626
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Science. ISSN 0036-8075 (print), 1095-9203 (online)