Elements of the comparative anatomy of vertebrates (1886) (21218970986)

Title: Elements of the comparative anatomy of vertebrates
Identifier: elementsofcompar00wied (find matches)
Year: 1886 (1880s)
Authors: Wiedersheim, Robert, 1848-1923; Parker, W. N. (William Newton), d. 1923
Subjects: Anatomy, Comparative; Vertebrates -- Anatomy
Publisher: London, New York, Macmillan
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library



Text Appearing Before Image:
COPULATORY ORGANS. 329 out life in the case of the female, while in the male the groove becomes closed to form a canal, and the urethra is considerably lengthened. Three cylindrical bodies, composed of erectile tissue (two lateral corpora cavernosa and a median corpus spon- gtosum), become developed in connection with the penis : these are connected with one another by a network of fibrous tissue, and are partially invested by muscles (Fig. 257, Ccp, Ccu). Corpora
Text Appearing After Image:
FIG. 257.—SEMIDIAGRAMMATIC FIGURE OF THE HUMAN PENIS. (A, transverse section ; B, side view ; C, from below.) A, albnginea penis; A1, albuginea urethras, which gives rise to a septum at 8-p ; S, sulcus dorsalis penis ; Ccp, corpus cavernosum ; Ccu, corpus spongiosum, which gives rise to the glans penis at Gp, and forms an oval enlargement (bulbus) at £ ; rd, rd1, cmra of the corpora cavernosa. cavernosa are also present in the clitoris, but a corpus spongiosum is wanting. In Marsupials and the higher Mammals the corpora cavernosa diverge at their proximal ends to form two crura (rd, rd1) which are almost always attached to the corresponding ischia. In many Mammals a membrane bone (04 penis) becomes developed in the septum between the corpora cavernosa (e.g. many Monkeys, Rodents, Bats, Carnivores). In the Seal there is an os clitoridis in the female also.