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Anatomical Illustration of Obturator Canal-stock-foto
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. A manual of gynæcology and pelvic surgery, for students and practitioners. n the external anal orifice. In the anterior tri-angle are found the urethral and vaginal orifices. The blood supply of the vulva and perineum is derived fromthe external and internal pudendals (pudics). The internalpudendals pass deeply along the ischial and pubic rami givingoff numerous superficial branches in their course. Branchesfrom the internal pudendal supply the corpora cavernosa, thebulbi vestibuli, and the labia. The veins correspond to thearteries. The inferior hemorrhoidal vessels supply the skinof the po-stock-foto
RM
. An American text-book of obstetrics. For practitioners and students. NAVICULAWf Jjevatorfbscia-!fianautar LtjmtiJuperfiaal layer- Sup-Perinea I fairie. jf<l Fig. 13.—Sagittal section of the perineal body,showing its component structures (life size). 32 AMERICAN TEXT-BOOK OF OBSTETRICS. fascia), the superficial or inferior, and the deep or superior layer of the trian-gular ligament. These fascial layers are attached at various levels to theischio-pubic rami anteriorly and laterally, and converge as they proceed back-. External superficialperineal nerve. Internal superficialperineal nerve.-stock-foto
RM
. An American text-book of obstetrics. For practitioners and students. Fig. : -Male pelvis seen from the front. female (Fig. 225) the sacrum is shorter, its general direction is more distinctlydownward and backward, its upper portion is much more concave from abovedownward, and the anteio-posterior curve is throughout more uniform than in. Fig. 223.—Female pelvis seen from the front (one-third natural size). the male. The symphysis is short, and the wider pubic arch, shortly to bespoken of, decreases the importance of the descending rami in the formationof the anterior wall. Inferior Strait.—I-stock-foto
RM
. An American text-book of obstetrics. For practitioners and students. Fig. 223.—Female pelvis seen from the front (one-third natural size). the male. The symphysis is short, and the wider pubic arch, shortly to bespoken of, decreases the importance of the descending rami in the formationof the anterior wall. Inferior Strait.—In the male (Fig. 222) the angle of the pubic arch meas- THE MECHANISM OF LABOR. 401 ures from 75° to 80°. The anterior wall of the pelvis—that is, the dis-tance between the symphysis and the tuberosities—is long as compared withthe pelvis of the female (Fig. 223), in whi-stock-foto
RM
. The science and art of midwifery. Diameters of the outlet. The circumference icus (vide Fig. 98).sixteen inches. The inferior strait proper, or outlet of the pelvis, is bounded bythe sub-pubic ligament, the pubic rami, the rami and tuberosities ofthe ischia, the sciatic ligaments, and the coccyx. Owing to the pro- MECHANISM OF LABOR. 159 jection of the iscliia, the surface of the pelvic outlet is rendered con-vex, or, perhaps, is better described by supposing it to be composedof two obtuse-angled triangles with apices at the symphysis and coccyx,and with a common base formed by a line drawn-stock-foto
RM
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. PELVIS. 189 pubic rami being approximated at the angular bend to f of an inch. In a case which was operated on by Dr. Hasbeke, and described in U Experience (No. 140.), the inferior pelvic outlet was nearly closed up entirely, the ischial tube- rosities being approximated to within two lines only, and the coccyx and pubes admitting only one finger between them.* In Mr. Kinder Wood's case, the deformity was rostrated, the most available space at the brim being a circle of 1 inch diameter to the left of the projecting prom-stock-foto
RM
This section from the *Cyclopedia of Anatomy and Physiology* focuses on the anatomical features of the human pelvis, including the pubic rami, ischial tuberosities, and the inferior pelvic outlet. It describes various deformities and their surgical interventions, as seen in cases like Dr. Hasbeke's and Mr. Kinder Wood's, highlighting pelvic anatomy and its clinical significance in surgery.-stock-foto