. Bulletin - United States National Museum. Science. 60 NATIONAL MUSEUM BULLETIN 273 PERINEAL MUSCULATURE-—MALE M. bulbospongiosus (fig. 21): This muscle surrounds the bulb of the penis and the crura of the corpora cavernosa. Its fibers arise from the longitudinal raphe along the superficial aspect of the bulbus and corpus spongiosum penis. A muscular coat is formed for these structures as the bundles in the anal half of the bulbospongiosus ascend almost perpendicularly toward their insertion in the pars membranacea of the urogenital sphincter, and tliose in the more ventral portion follo
. Bulletin - United States National Museum. Science. 60 NATIONAL MUSEUM BULLETIN 273 PERINEAL MUSCULATURE-—MALE M. bulbospongiosus (fig. 21): This muscle surrounds the bulb of the penis and the crura of the corpora cavernosa. Its fibers arise from the longitudinal raphe along the superficial aspect of the bulbus and corpus spongiosum penis. A muscular coat is formed for these structures as the bundles in the anal half of the bulbospongiosus ascend almost perpendicularly toward their insertion in the pars membranacea of the urogenital sphincter, and tliose in the more ventral portion follow an oblique ventrocranial course around the corpus spongiosum and tlie crura of the cavernous bodies on their way to. Figure 2L—Perineal musculature, caudal aspects of Cd 2 and hemal arch 2 (1, m. ischio- urethralis; 2, m. ischiocavcrnosus; 3, m. ischiocaudalis; 4, m. sphincter ani externus; 5, m. pubocaudalis; 6, m. iliocaudalis; 7, m. sphincter urethrae; 8, m. bulbocavernosus).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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