. A treatise on practical anatomy: for students of anatomy and surgery . e tip ofthe coccyx. Be-tween the tuberosi-ties of the ischiaanteriorly is thepubic arch, formedby the rami of theischia and PELVIS. rpi cinienor strait A A, antero-posterior diameter; B B, transverse diameter; -L Xic ^\^x±wi OLic«,iu C C, two oblique diameters; 1, sacro-iliao ligament; 2, anterior -i i. JZ or lesser sacro-sciatic ligament; 3, posterior or great sacro-sciatic meaSUrOS aOOUt 11VOligament. inches transverselyand about four inches antero-posteriorly. The truepelvis is about four and a h
. A treatise on practical anatomy: for students of anatomy and surgery . e tip ofthe coccyx. Be-tween the tuberosi-ties of the ischiaanteriorly is thepubic arch, formedby the rami of theischia and PELVIS. rpi cinienor strait A A, antero-posterior diameter; B B, transverse diameter; -L Xic ^\^x±wi OLic«,iu C C, two oblique diameters; 1, sacro-iliao ligament; 2, anterior -i i. JZ or lesser sacro-sciatic ligament; 3, posterior or great sacro-sciatic meaSUrOS aOOUt 11VOligament. inches transverselyand about four inches antero-posteriorly. The truepelvis is about four and a half inches in diameter. Theinferior strait measures about four inches transverselyand about four anda half inches ante-ro-posteriorly. Thedepth of the truepelvis is about twoinches anteriorly,about four and ahalf inches posteri-orly. The axis ofthe true pelvis is aline equidistant be-tween the anteriorand posterior wallsof the pelvis. Thepelvis is tilted up-ward and forward, so that the promontory of the sacrumis about four inches higher than the upper border of the. Fig. 61.—The Axis of the Pelvis. a b, plane of the superior strait (brim); o i, plane of theinferior strait (outlet); c, the point where these two planeswould meet, if prolonged; »i n, a horizontal line; e/, axis ofbrim; g k, axis of cavity: p q r s t, various points taken on thesacrum to show the plane of the cavity at each point. THE FEMUR. 133 pubes. The plane of the superior strait forms an angleof about 60 degrees; the plane of the inferior strait varies,but approximates the horizontal. The pelvis presentssome sexual differences; tlius, in the vigorous adult— MALE. 1. The bones are heavy. 2. Osseous processes and mar- gins are strongly devel-oped. 3. Ilia compressed, 4. Diameter through the cot3ioid cavities con-tracted. 5. The diameters less than stated above. 6. The pelvis is deep. 7. Diameters of inlet and out- let irregular. 8. The ischia approach each other. 9. The pubic angle or arch acute. 10. Th
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomy, bookyear1891
