Outlines of Veterinary Anatomy

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 Excerpt: ...urethra projects as the urethral tube; the urethral sinus is a two-lobed cavity containing the secretion of sebaceous glands, and opening into the depression surrounding the urethral tube. The suburethral notch interrupts the continuity of the glans inferiorly. Muscles connected with the Penis.--1. The suspensory cords, or retractor penis muscles. These structures, two in number, and composed of non-striated muscular fibres, commence on the inferior surface of the sacrum, pass downwards in front of the sphincter ani, unite below the anus, and finally pass along the inferior face of the penis to the glans, being connected by fibrous tissue with the accelerator urinre. 2. Erector Penis.--This is a small muscle passing from the tuber ischii to the penis, raising and retracting that organ. Structure.--The penis consists essentially of erectile tissue; it is composed of two bodies--the corpus spongiosum and corpus cavernosum. The corpus spongiosum belongs to the urethra. The corpus cavernosum is sometimes described as a double body; this, however, is unnecessary, as the fibrous septum--septum pectiniforme--is very incomplete. The posterior extremity is expanded to form the crura or roots of the penis; these are attached to the ischial arch. The anterior extremity is blunt, and placed immediately behind the glans. The corpus cavernosum is provided with a strong, dense, fibrous envelope--the tunica albuginea--which forms the incomplete partition in the middle of the corpus--the septum pectiniforme--and sends numerous trabecular into its interior. Between the trabecule large vascular spaces are seen, which become distended with blood during erection. When the penis is in a flaccid condition, the blood passes from the capillaries into the veins in the usual manner. ...