Bulbourethral gland: Difference between revisions

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[[File:Prostatic urethra.svg|thumb|left|220px|Dissection of prostate showing the bulbourethral glands within the fibers of the external urethral sphincter just underneath the prostate]]
[[File:Pre cum 160717.jpg|thumb|150px|Secretory fluid from the bulbourethral glands appearing on the [[glans penis|glans]] of a human [[penis]]]]
The bulbourethral glands are compound [[Alveolar gland|tubulo-alveolar glands]], each approximately the size of a [[pea]] in humans. In chimpanzees, they are not visible during dissection, but can be found on microscopic examination.<ref name="Schwartz1988">{{cite book|author=Jeffrey H. Schwartz|title=Orang-utan Biology|url=https://books.google.com/books?id=K6XZOOinwPAC&pg=PA92|accessdate=August 20, 2013|year=1988|publisher=Oxford University Press|isbn=978-0-19-504371-6|page=92}}</ref> In boars, they are up to 18&nbsp;cm long and 5&nbsp;cm in diameter.<ref name="McEntee2012" /> They are composed of several [[Lobe (anatomy)|lobules]] held together by a fibrous covering. Each lobule consists of a number of [[Acinus|acini]], lined by columnar [[epithelium|epithelial cells]], opening into a [[duct (anatomy)|duct]] that joins with the ducts of other lobules to form a single excretory duct. This duct is approximately 2.5&nbsp;cm long and opens into the bulbar urethra at the base of the penis. The glands gradually diminish in size with advancing age.<ref>''[[Gray's Anatomy]]'', 38th ed., p 1861.</ref>{{Unreliable source?|failed=y|date=January 2013}}
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