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Retractor muscle of the penis

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(Redirected from Retractor penis muscle) Anatomical feature of male carnivoran, marsupial and ungulate mammals
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In some animals, the male penis possesses a muscle enabling retraction into the prepuce.

In particular animals

The retractor penis muscle occurs in marsupials and carnivorans, but it is absent in humans. A stag's penis forms an S-shaped curve when it is not erect, and is retracted into its preputial sheath by the retractor penis muscle.

In Tandonia, the retractor penis inserts at the boundary between the penis and epiphallus.

In stallions, the retractor penis muscle is relatively underdeveloped. The retractor muscle contracts to retract the penis into the sheath and relaxes to allow the penis to extend from the sheath.

In bulls, protrusion is not affected much by erection, but more by relaxation of the retractor penis muscle and straightening of the sigmoid flexure.

References

  1. Bassett, E. Gertrude. "Observations on the retractor clitoridis and retractor penis muscles of mammals with special reference to the ewe." Journal of anatomy 95.Pt 1 (1961): 61.
  2. Rue III, Leonard Lee (2004-11-01). The Deer of North America. Globe Pequot. p. 312. ISBN 9781592284658. Retrieved 2 March 2013.
  3. "Genus summary for Tandonia". AnimalBase, last modified 23 May 2010, accessed 26 August 2010.
  4. ^ Sarkar, A. (2003). Sexual Behaviour In Animals. Discovery Publishing House. ISBN 978-81-7141-746-9.
  5. "The Stallion: Breeding Soundness Examination & Reproductive Anatomy". University of Wisconsin-Madison. Archived from the original on 2007-07-16. Retrieved 7 July 2007.
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