File:Quain's elements of anatomy (1882) (14763396502).jpg

Identifier: quainselementsofquai02 (find matches)
Title: Quain's elements of anatomy
Year: 1882 (1880s)
Authors: Quain, Jones, 1796-1865 Thomson, Allen, 1809-1884 Sharpey-Schäfer, E. A. (Edward Albert), Sir, 1850-1935, ed Thane, George Dancer, 1850-1930
Subjects: Human anatomy Anatomy
Publisher: New York : William Wood and co.
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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extends from the neck of the bladder to theextremity of the penis. Its total length is about eight inches and a half,but varies much according to the length of the penis, and the conditionof that organ. - Except during the passage of urine or semen the canal isa mere cleft elongated transversely and with the superior and inferiorparts of the wall in contact (see fig. 584, v). Its diameter when moderatelydistended varies at different parts of its extent, as will be stated moreparticularly hereafter. The tube consists of a continuous mucousmembrane, supported by an outer layer of submucous tissue connectingit with the several parts through which it passes. In the submucoustissue there are, throughout the whole extent of the urethra, two layers STEUCTUEE OF COEPUS SPOXGIOSUil. 677 of plain muscular fibres, the inner fibres disposed longitudinally, and theouter in a circular direction. The urethra is described under the threedivisions of the prostatic, menibranous, and sijongij portions.
Text Appearing After Image:
Pig. 589.—The lower paet of the bladder and the prostatic, membranous, and BULBOUS PARTS OP THE URETHRA OPENED FROM ABOVE. (Allen ThomSOn.) A portion of tbe waU of tlie bladder and the upper part of the prostate gland have beenremoved, the corpora cavernosa penis have been separated in the middle line and turnedto the side, and the urethra has been slit up ; the bulb is left entire below, and uponand behind it the glands of Cowper with their ducts have been exposed, t, placed in themiddle of the trigonum vesicee ; u, u, oblique apertures of the ureters; from these anelevation of the wall of the bladder is shown running down to i( v, the uvula vesicje ; I, thelongitudinal muscular fibres of the bladder passing down upon the prostate ; s v, thecircular fibres of the sphincter; p, the glandular part of the prostate ; ^j, the prostaticportion of the urethra ; from the uvula vesicEe a median ridge is seen descending to thecaput gallinaginis, in which s indicates the opening of the prosta

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