. Anatomy, descriptive and applied. Anatomy. THE MALE URETHRA of the urethra and the deep layer of the triangular ligament and lies within the pelvic cavity. It passes almost vertically through the prostate gland from its base to its apex, lying nearer its anterior than its posterior surface. The gland seeTus to completely surround this portion of the urethra (Fig. 1166), but the glandular substance proper does not (Fig. 1169). The gland is like a clasp open in front, and the open part of the clasp is closed by the prostatic muscle. The form of the canal is spindle-shaped, being wider in
. Anatomy, descriptive and applied. Anatomy. THE MALE URETHRA of the urethra and the deep layer of the triangular ligament and lies within the pelvic cavity. It passes almost vertically through the prostate gland from its base to its apex, lying nearer its anterior than its posterior surface. The gland seeTus to completely surround this portion of the urethra (Fig. 1166), but the glandular substance proper does not (Fig. 1169). The gland is like a clasp open in front, and the open part of the clasp is closed by the prostatic muscle. The form of the canal is spindle-shaped, being wider in the middle than at either extremity, and narrowest below, where it joins the membranous portion. Except during the passage of fluid, the canal is in a collapsed state and is horseshoe-shaped on trans-section, the anterior M'all resting upon the posterior wall (Fig. 1137), and the mucous membrane exhibiting longi- tudinal folds. When distended, the largest portion of the prostatic urethra in the ca- daver has a diameter of about one-half inch (12 mm.). Upon the posterior wall or floor of the canal is a narrow longitudinal ridge, the verumontanum or caput gallinaginis (Figs. 1136 and 1171) {crista iirethralis), formed by an elevation of the mucous membrane and its subjacent tissue (Fig. 1170). It is about 16 mm. in length and about 3 mm. in height, and contains, according to Kobelt, muscle and erectile tissues. On either side of the verumontanum is a slightly depressed fossa, the prostatic sinus, the floor of which is perforated by numerous aper- tures, the orifices of the prostatic ducts (Figs. 1136 and 1171), from the lateral lobes of the glands; the ducts of the middle lobe open behind the verumontanum. At the forepart of the verumontanum, in the middle line, is a depression, the sinus pocularis {idriculus prostaticus) (Figs. 337 and 1171), upon the margins of which are the slit-like openings of the ejaculatory ducts (Fig. 1171). The sinus pocularis forms a cul-de-sac about a
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
