Identifier: b20416039_003 (find matches)
Title: On the anatomy of vertebrates (electronic resource)
Year: 1866 (1860s)
Authors: Owen, Richard, 1804-1892
Subjects: Anatomy, Comparative Vertebrates Fishes Reptiles Mammals Birds
Publisher: London : Longmans, Green
Contributing Library: Wellcome Library
Digitizing Sponsor: Wellcome Library

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ix-teenth of a line in diameter, usually coalesce into a single excre-tory duct. The ducts of each gland run parallel for the distanceof half an inch beneath the mu-cous membrane of the bulb, andapproaching each other, theypierce the urethra by two ex-ceedingly minute orifices. The penis consists of the erec-tile tissues called i corpora caver-nosa and f corpus spongiosum,the latter inclosing the urethraand expanding at its hind endinto the fbulb and at its foreend into the 6 glans. The6 corpus cavernosum forms inMan more than two-thirds ofthe bulk of the penis: it is alengthened subdepressed cy-linder, with a median grooveboth above and below; the uppergroove lodging the dorsal vein,arteries, and nerves, and theunder one the corpus spongio-sum. Anteriorly the corpuscavernosum terminates in an ob-long and rounded extremity,which is received into a depres-sion on the posterior surface of the glans; posteriorly it is at-tached to the ischiopubic rami by its two crura; and above it x x 2
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Vesicular and prostatic glands, with proto-metra, Human ; half nat. size, cclxviii. 676 ANATOMY OF VERTEBRATES. is connected to the symphysis pubis by means of a strong tri-angular fascia, the 4 ligamentum suspensorium penis. The 4 corpus cavernosum is composed of a cellular structureenclosed in a strong sclerous tunic, from the inner surface ofwhich are given off numerous bands, 4 trabecule, which convergetowards the middle line of the inferior wall; they are mostabundant in the middle line of the organ, where they form aseptum between the two lateral halves of the corpus cavernosum:but this becomes incomplete or 4 pectinate anteriorly. Theso-called cellular structure of the corpus cavernosum consists of aplexus of dilated and freely intercommunicating veins, the inter-spaces of which are occupied by contractile tissue : the fibresbeing unstriped and with a general arrangement transversely tothe axis of the penis. Besides the 4 erectores penis and 4 accelerators urinai, there isa rem

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