On the anatomy of vertebrates (electronic resource) (1866) (14564328189)

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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he acceleratorfibres, g ; but degenerates into little more thana close venous plexus as it penetrates, in thePorpoise, the corpus cavernosum; it thenemerges and extends along the under part ofthe corpus cavernosum, to re-expand into thevenous plexus surrounding the tuberous basisof the glans. The upper part, or dorsum, of the cavernous bodyis grooved for the lodgment ofthe plexiform vena dorsalis. Inthe unexcited state the penisis withdrawn and concealed inthe long prepuce, the orifice ofwhich is considerably in ad-vance of the vent. The retrac-tion is effected by a pair ofmuscles, m, arising from theaponeurotic commissure ante-rior to the sphincter ani e, andrunning along the under orurethral side of the penis tobe inserted into the sclerousbasis of the glans. The pro-trusion of the organ is aidedby the transverse fibres of thee panniculus carnosus sur-rounding the preputial sheath.The section of the penis ofa Balcenoptera preserved byHunter shows a single corpus cavernosum u u 2 518

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Male organs, Phoccena. grooved above for the 6G0 ANATOMY OF VERTEBRATES. vena dorsalis, and more deeply excavated below for the corpusspongiosum urethras.1 § 375. In Sire)da.—These mutilate Mammals are also 4 testi-conda, but differ from the Cetacea in having vesicular glands, apenis with a septum corporis eavernosi, and provided with apair of levatores, which unite to form a tendon upon the6 dorsum. In the Dugong (Ha lie ore), the glans consists of twosemilunar side-lobes, including the conical process, on the apexof which the urethra opens. In a half-grown male the vesicularglands were four inches long and two inches across the fundus,where their glandular parietes were thickest; the internal sur-face was reticulate. The vasa deferentia were irregularly con-voluted : they communicated with the duct of the vesiculargland, the common opening being into the dilated beginning ofthe urethra, which describes a curve below the vesical orifice:according to Louckart, it receives the openi

Urogenitalsystem männliches Fortpflanzungssystem von Säugetieren Zur Anatomie der Wirbeltiere 1866 Buchillustrationen Vogelkunde Vögel Zoologische Illustration Tiere Säugetiere Vergleichende anatomie Wirbeltiere Zoologie Bilder aus dem Internetarchiv

1866

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