. The physiology of reproduction. Reproduction. 250 THE PHYSIOLOGY OF REPRODUCTION On the other hand, the corpora cavernosa and the glans are represented by homologous structures. The clitoris, like the penis, contains very numerous sensory nerve endings ^ and under- goes erection during sexual congress. The relation between the clitoris and the uro-genital canal is closer in some Mammals than in others. In some species { the capybara among the Rodents, and Twpaia among Insectivores) the clitoris is of considerable size, and is grooved along its under surface in relation to the upper wall
. The physiology of reproduction. Reproduction. 250 THE PHYSIOLOGY OF REPRODUCTION On the other hand, the corpora cavernosa and the glans are represented by homologous structures. The clitoris, like the penis, contains very numerous sensory nerve endings ^ and under- goes erection during sexual congress. The relation between the clitoris and the uro-genital canal is closer in some Mammals than in others. In some species { the capybara among the Rodents, and Twpaia among Insectivores) the clitoris is of considerable size, and is grooved along its under surface in relation to the upper wall of the urethra. In other animals { Arvicoh, Talpa, and Stenops) the groove on the under surface of the elongated clitoris is converted by the coalescence of its margins into a tube, which. Fig. 64.âDistal end of bull's penis as seen from left side, showing glans and urethral papilla representing vestigial filiform appendage. The prepuce is folded back. About two-thirds natural size. constitutes the urethral portion of the uro-genital canal. Further, in the female of the spotted hyena {H. crocuta), the whole of the uro-genital canal, beyond the apertures of the ducts of Barthohni's glands, is prolonged forward to the ex- tremity of the clitoris and terminates in a similar manner to that of the urethra of the male. In this animal, therefore, the vagina is completely absent, the os uteri opening directly into the uro-genital canal, which is elongated and tubular in form as in the male. A somewhat similar condition has been known to occur abnormally in the human female.^ 1 â Worthmann,"Beitrage zur Kenntniss der Nervenausbreitung in Clitoris und Vagina," Arch. f. Mikr. Anat., vol. Ixviii. 2 Watson (M.), " The Homology of tlie Sexual Organs illustrated by Com- parative Anatomy and Pathology," Jour, of Anat. and Phys., vol xiv., Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
Size: 2261px × 1105px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectreproduction, bookyea
