Penile sheath: Difference between revisions
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During [[musth]], a male elephant may urinate with the penis still in the sheath, which causes the urine to spray on the hind legs.<ref name=Sukumar100>Sukumar, pp. 100–08.</ref> |
During [[musth]], a male elephant may urinate with the penis still in the sheath, which causes the urine to spray on the hind legs.<ref name=Sukumar100>Sukumar, pp. 100–08.</ref> |
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Male dogs have a conspicuous [ |
Male dogs have a conspicuous [penis sheath.<ref name="Schaller2009">{{cite book|author=George B. Schaller|title=The Serengeti Lion: A Study of Predator-Prey Relations|url=http://books.google.com/books?id=7ann2dYn9iYC&pg=PA329&dq=urinate+sheath+canid&hl=en&sa=X&ei=IvEXUZUCz4bRAcGugdAB&ved=0CEsQ6AEwAw#v=onepage&q=urinate%20sheath%20canid&f=false|accessdate=10 February 2013|date=15 October 2009|publisher=University of Chicago Press|isbn=978-0-226-73660-0|pages=329–}}</ref> |
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In stallions, the [[retractor penis muscle]] contracts to retract the [[horse penis|stallion's penis]] into the sheath and relaxes to allow the penis to extend from the sheath.<ref>{{cite web|title=The Stallion: Breeding Soundness Examination & Reproductive Anatomy|publisher=University of Wisconsin-Madison|url=http://www.wisc.edu/ansci_repro/101equinelab/reproduction/stallion_exam.html|accessdate=7 July 2007|archiveurl=http://web.archive.org/web/20070716140038/http://www.wisc.edu/ansci_repro/101equinelab/reproduction/stallion_exam.html|archivedate=2007-07-16}}</ref> |
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==References== |
==References== |
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Revision as of 21:52, 11 May 2013
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Wikimedia Commons has media related to Mammal foreskin.
Almost all mammal penises have foreskins, although in non-human cases the foreskin is usually a sheath (sometimes called the preputial sheath[1] or penile sheath[2]) into which the whole penis is retracted. In koalas, the foreskin contains naturally occurring bacteria that play an important role in fertilization.[3] Only monotremes (the platypus and the echidna) lack foreskins.[4]
During musth, a male elephant may urinate with the penis still in the sheath, which causes the urine to spray on the hind legs.[5]
Male dogs have a conspicuous [penis sheath.[6]
In stallions, the retractor penis muscle contracts to retract the stallion's penis into the sheath and relaxes to allow the penis to extend from the sheath.[7]
References
- ^ Edward C. Feldman (2004). Canine and feline endocrinology and reproduction. Elsevier Health Sciences. pp. 934–. ISBN 978-0-7216-9315-6. Retrieved 25 April 2013.
- ^ The behavior guide to African mammals: including hoofed mammals, carnivores, primates. University of California Press. 1991. pp. 116–. ISBN 978-0-520-08085-0. Retrieved 25 April 2013.
- ^ "UQ researchers unlock another koala secret". Uq.edu.au. 2001-05-09. Retrieved 2012-07-16.
- ^ "Reproductive System". MSN Encarta. Seattle, WA, USA: Microsoft Corporation. 2006. Archived from the original on 2009-10-31.
{{cite encyclopedia}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ Sukumar, pp. 100–08.
- ^ George B. Schaller (15 October 2009). The Serengeti Lion: A Study of Predator-Prey Relations. University of Chicago Press. pp. 329–. ISBN 978-0-226-73660-0. Retrieved 10 February 2013.
- ^ "The Stallion: Breeding Soundness Examination & Reproductive Anatomy". University of Wisconsin-Madison. Archived from the original on 2007-07-16. Retrieved 7 July 2007.