. The anatomy of the domestic animals . Veterinary anatomy. .y Fig. 514.—Right Testicle and Spermatic Cord of Horse, Enclosed in Tunica \'agixaiis. c, Tunica vaginalis commums; g, prominence caused by tail of epididymis; p, cremaster externus muscle. (After Ellenberger-Baum, Top. Anat. d. Pferdes.) Fig. 515.—Right Testicle and Spermatic Cord of Horse, Exposed. a'. Lateral surface of testicle; c, tunica vagin- alis, cut and reflected; d, reflection of tunica vaginalis; e, mesorchium; g, tail, /i, body, i, head, of epididymis; k, sinus epididymidis; /, spermatic vessels showing through tunica va
. The anatomy of the domestic animals . Veterinary anatomy. .y Fig. 514.—Right Testicle and Spermatic Cord of Horse, Enclosed in Tunica \'agixaiis. c, Tunica vaginalis commums; g, prominence caused by tail of epididymis; p, cremaster externus muscle. (After Ellenberger-Baum, Top. Anat. d. Pferdes.) Fig. 515.—Right Testicle and Spermatic Cord of Horse, Exposed. a'. Lateral surface of testicle; c, tunica vagin- alis, cut and reflected; d, reflection of tunica vaginalis; e, mesorchium; g, tail, /i, body, i, head, of epididymis; k, sinus epididymidis; /, spermatic vessels showing through tunica vaginalis propria; m, end of spermatic arteo'. Dotted line indicates position of ductus deferens on other side of mesorchium. (After Ellen- berger-Baum, Top. Anat. d. Pferdes.) which, by its complex coils, forms the body and tail of the epididymis and termin- ates in the ductus deferens. The tubules and the coils of the duct of the epididymis are held together by coimective tissue and unstriped muscle-fibers. The tubules and duct are lined with ciliated epithelium, and the duct has a muscular coat which consists of longitudinal and circular fibers. Several fcetal remnants in connection with the epididymis and adjacent part of the spermatic cord have been described in man. The appendix epididymidis is a small, piriform body, 3-4 mm. long, which is attached to the head of the epididymis. The paradidymis consists of a number of tubules which lie in the lower part of the spermatic cord close to the head of the epididymis. Most of the tubules are blind and disappear in early life, but one or more may communicate with the epididymis or rete testis; the latter may give rise to cysts. The ductuli aberrantes are tubules that extend upward from the canal of the epididymis and end blindly. Similar structures have been mentioned as occurring in the domestic animals, but authentic data in regard to them are lacking. Vessels and Nerves.—The testicle is richly supplied with blood by the s
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