Ductus Deferens

A. General features. The ductus deferens begins at the inferior pole of the testes, ascends to enter the spermatic cord, transits the inguinal canal, and enters the abdominal cavity by passing through the deep inguinal ring. It is joined by the seminal vesicle at the ampulla of the ductus deferens, to form the ejaculatory duct. The ejaculatory duct passes through the prostate gland and opens into the prostatic urethra at the urethral crest.

B. Clinical consideration. In a vasectomy, the scalpel cuts through the following layers in succession to gain access to the ductus deferens: skin Colles fascia and dartos mus-^ ^┬┐SA._> ^^sasXfc^ TOUS^W uvtowaV spermatic fascta ~y exuaveutonea\ tat. TYve tunica vagmaYvs \s not cut.

IV. CONTENTS OF THE SPERMATIC CORD include the ductus deferens, testicular artery, artery of the ductus deferens, cremasteric artery, pampiniform venous plexus, sympathetic and parasympathetic nerves, genitofemoral nerve, and lymphatics.

V. SEMINAL VESICLE produces seminal fluid, which contains fructose and choline. In forensic medicine, the presence of fructose, which is not produced elsewhere in the body, used to determine whether sexual assault has occurred. Detection of choline crystals is the preferred method of determining the presence of sperm.

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