. Elements of comparative anatomy. Anatomy, Comparative. GENERATIVE ORGANS OF VERTEBRATA. G23. Fig. 356. Divided penis of Didelpkys philander. a b Halves of the glans. s Groove on its inner surface. x Region of the anus which is placed behind the orifice of the prepuco (after Otto). which are derived from tlie genital protuberance and surround the urogenital canal ; in some they are divided at their free end (Fig. 356, a b) and form the glans penis. The urogenital canal is continued on to each half in the form of a groove (s), and these grooves may unite together to form a canal. In others (Ha
. Elements of comparative anatomy. Anatomy, Comparative. GENERATIVE ORGANS OF VERTEBRATA. G23. Fig. 356. Divided penis of Didelpkys philander. a b Halves of the glans. s Groove on its inner surface. x Region of the anus which is placed behind the orifice of the prepuco (after Otto). which are derived from tlie genital protuberance and surround the urogenital canal ; in some they are divided at their free end (Fig. 356, a b) and form the glans penis. The urogenital canal is continued on to each half in the form of a groove (s), and these grooves may unite together to form a canal. In others (Halmaturus) these erectile bodies are connected with two others, with which they unite to form a cylindrical penis, and bound the urogenital canal. The first- mentioned erectile bodies generally fuse very early in other Mammalia to form a corpus caver- nosum urethras which surrounds the urogenital canal (urethra), and of which the most anterior end, which varies greatly in form, forms the glans penis. The two other erectile bodies (corpora cavernosa penis), which in the Marsupialia are not firmly connected with the pelvis, are con- nected with the ischium; they pass above the corpus cavernosum urethras, but do not extend into the wall of the urogenital canal. In most Mammals the penis thus formed extends for- wards from the symphysis pubis along the median line of the abdomen, and ends at a varying distance from the umbilicus; in others (Chiroptera, Primates), it is free and hangs down from the symphysis pubis. In either case, the integument covers it and forms a fold in front of, and around the glans — the prepuce. In the female, the genital protuberance is never developed to the same extent as in the male; it forms the clitoris, which carries on its lower surface the opening of the urogenital sinus, which is bounded by lateral folds. The clitoris is generally more largely developed in the embryo than in the adult, as it projects from the pubic fissure and is afterwards withdr
Size: 1236px × 2023px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectanatomycomparative
