Journal of Andrology Testis Workshop 2009
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Published-Ahead-of-Print January 24, 2008, DOI:10.2164/jandrol.107.004119
Journal of Andrology, Vol. 29, No. 3, May/June 2008
Copyright © American Society of Andrology
DOI: 10.2164/jandrol.107.004119

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Review

De Graaf's Thread: The Human Epididymis

TERRY T. TURNER

From the Departments of Urology and Cell Biology, University of Virginia School of Medicine, Charlottesville, Virginia.

Correspondence to: Dr Terry T Turner, Department of Urology, University of Virginia School of Medicine, PO Box 800422, Charlottesville, VA 22908 (e-mail: ttt{at}virginia.edu).



Abstract

The epididymis consists of a single, highly coiled and convoluted tubule that Antoine De Graaf, the famous 17th-century anatomist, likened to a thread thickening to a string. The uncoiled tubule is several meters long and sperm in transit through it become functionally mature under the under the influence of the tubule lumen's microenvironment. The regulation of that microenvironment and the manner by which it influences sperm maturation have been the topic of investigation for many years, though the study of the human epididymis directly is fraught with problems related to sample availability and condition. Nevertheless, investigations using a variety of mammalian tissue sources, human included, have resulted in significant advances in our understanding of both the biology and pathology of the organ. The epididymal functions of transporting, concentrating, maturing, and storing sperm are important to male fertility and their absence or significant impairment can be a factor in male infertility.




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R. P. Amann
Considerations in Evaluating Human Spermatogenesis on the Basis of Total Sperm per Ejaculate
J Androl, November 1, 2009; 30(6): 626 - 641.
[Abstract] [Full Text] [PDF]


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