. Anatomy of the cat. Cats; Mammals. 26o THE VISCERA. sac, enveloped in the membranes or tunics described when treating of the scrotum. Each is attached to the dorsal wall of its peritoneal pouch by a mesenteric fold. The testis is sur- rounded by the visceral layer of the tunica vaginalis propria, and within this, by a dense fibrous covering, the tunica albu- ginea, which sends septa into its interior. Within the fibrous covering it is made up of numerous coils of seminiferous tubules which are readily seen by the naked eye. The epididymis (Fig. i lo, c) is the beginning of the efferent duct
. Anatomy of the cat. Cats; Mammals. 26o THE VISCERA. sac, enveloped in the membranes or tunics described when treating of the scrotum. Each is attached to the dorsal wall of its peritoneal pouch by a mesenteric fold. The testis is sur- rounded by the visceral layer of the tunica vaginalis propria, and within this, by a dense fibrous covering, the tunica albu- ginea, which sends septa into its interior. Within the fibrous covering it is made up of numerous coils of seminiferous tubules which are readily seen by the naked eye. The epididymis (Fig. i lo, c) is the beginning of the efferent duct of the testis. It appears as a flat band with a broad rounded end which lies on the medial surface of the testis at its cranial end (^). From this point it passes about the cranial end of the testis from its medial to its lateral surface, forming thus a semicircle with the convexity ventrad. Thence it passes as a narrower band (c) along the dorsal side of the testis, laterad of the sus- pending mesentery, to the caudal end of the testis [d). At the caudal end of the testis it is enlarged, passes from its lateral to its medial surface, and turns at the same time craniad to become continuous with the vas deferens {e). The enlarged cranial end is the caput epi- didymis (lA ; the enlarged caudal end the Cauda Fig. 1 lo.—Testis. •' ^ ?' ' *^ a. testis; i>, caput epididymis (d). The whole epididymis is epididymis; c, epi- encased in a tough fibrous covering similar to didymis; </, caiuia . • , it. epididymis; e, vas that of the tcstis. 1 he fibrous covering (albu- deferens; /, sper- pIj^qq\ ^f the testis and that of the epididymis matic cord. ts / -itt- , • i are connected by fibrous tissue. Within the fibrous covering the head of the epididymis is made up of tubules which pass from the testis into its end: these are the vasa efferentia testis. The vasa efferentia unite within the caput into a single vessel which passes in a very tortuous course to the Cauda. Its numero
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