1 Epididymis. Lying on the posteromedial surface 19 of the testis, it serves as a storage receptacle for sperm. A

2 Head of epididymis. Caput epididymidis. It is occupied by the efferent ductules. A

3 Body of epididymis. Corpus epididymidis. Middle segment of the epididymis consisting of the convolutions of the duct of the epididymis. A

4 Tail of epididymis. Cauda epididymidis. Inferior, terminal portion of the epididymis consisting of the convolutions of the duct of the epididymis. A

5 Lobules (cones) of epididymis. Lobuli coni epididymidis. Wedge-shaped lobules in the head of the epididymis separated by connective tissue and formed by one or two efferent duc-tules. A

6 Duct of epididymis. Ductus epididymidis. Coiled duct, 5-6 meters long, beginning at the end of the head of the epididymis where it receives the efferent ductules. It terminates at the end of the tail where it is continuous with the ductus deferens. A

7 Aberrant ductules. Ductuli aberrantes. Blind 26 branches of the efferent ductules and duct of the epididymis representing vestiges of the caudal mesonephric tubules. 27

8 [Ductulus aberrans superior]. Superior aberrant ductule in the head of the epididymis.

9 [Ductulus aberrans inferior]. Inferior aberrant ductule in the tail of the epididymis. A

10 Appendix testis. Vesicular appendage superior to the testis (vestige of the paramesonephric duct). A

11 [Appendix epididymidis]. Appendix of epid-idymis. Pedunculate appendage at the head of the epididymis (vestige of the mesonephros). A

12 Paradidymis. Bilateral blind ductules superior 30 to the head ofthe epididymis and in frontofthe spermatic cord (remnant of mesonephric tubules). A

13 Ductus deferens. Spermatic duct, about 60 cm long, between the epididymis and the seminal vesicle. It is initially coiled and then becomes straight. A B D E 31

14 Ampulla of ductus deferens. Ampulla ductus deferentis.Ovalenlargementofductus deferens just prior to joining the duct of the seminal vesicle. B

15 Diverticula of ampulla. Diverticula ampullae. Lateral sacculations in the wall of the ampulla of the ductus deferens. B

16 Tunica adventitia. Connective tissue covering of the ductus deferens. E

17 Tunica muscularis. Relatively very thick muscle layer of the ductus deferens. E

18 Tunica mucosa. Mucous membrane of ductus deferens lined by pseudostratified, stereocil-iated, columnar epithelium. E

Ejaculatory duct. Ductus ejaculatorius. Spermatic duct formed by the union of the ductus deferens and the duct of the seminal vesicle. It traverses the prostate and empties into the prostatic urethra. B

Seminal vesicle. Vesicula seminalis. Erroneously designated as a receptacle for sperm, this organ is a vesicular gland which consists of a coiled tube, about 12 cm in length. B C Tunica adventitia. Connective tissue covering of the seminal vesicle. C Tunica muscularis. Muscular layer in the wall of the seminal vesicle. C

Tunica mucosa. Multilocular mucous membrane of the seminal vesicle lined by a simple secretory epithelium. C

Excretory duct. Ductus excretorius. Efferent duct of the seminal vesicle. It unites with the ductus deferens to form the ejaculatory duct. B Spermatic cord. [[Funiculus spermaticus]]. It consists of the ductus deferens, accompanying vessels, nerves and connective tissue, together with its coverings. D

Tunicae funiculi spermatici. Coverings of the spermatic cord and the testis, described below. D

External spermatic fascia. Fascie spermatica externa. Outer covering of the spermatic cord, which is continuous with the fascia ofthe external oblique m. of the abdomen. It also envelops the testis together with its remaining coverings. D

M. cremaster. Elevator of the testis. It is derived mainly from internal abdominal oblique muscle. D

Cremasteric fascia. Fascia cremasterica. Connective tissue on and between the cremaster muscle fibers. D

Internal spermatic fascia. Fascia spermatica interna [tunica vaginalis communis]]. The fingerlike inner covering of the spermatic cord, which is derived from the transverse fascia. It lies beneath the cremaster muscle and surrounds the testis, epididymis and ductus deferens together with blood vessels and nerves. D Vestige of vaginal process. [Vestigium processus vaginalis]. Remnant of the not completely obliterated embryological vaginal process ofthe peritoneum. D

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