Bassett Collection of Stereoscopic Images of Human Anatomy

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Dissection of male pelvis from a lateral approach

Interior of seminal vesicle, ejaculatory duct and ampulla of ductus deferens

Image #171-4

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Dissection of male pelvis from a lateral approach

Interior of seminal vesicle, ejaculatory duct and ampulla of ductus deferens

The prostate shown in the preceding view has been removed from the body for separate dissection. The median lobe (7) has been removed to the left of the midline to gain access to the left ejaculatory duct. The ejaculatory duct has been opened and incisions have been continued to open the left seminal vesicle and the ampulla of the ductus deferens. An aberrant diverticulum (2) of the ampulla of the ductus deferens is present on the left. Approximately 2 mm. of the terminal, blind extremity of this diverticulum was cut off. The diverticulum communicates with the ampulla posteromedially near the beginning of the ejaculatory duct.

1 .	Ductus deferens left
2 .	Aberrant diverticulum from ductus deferens
3 .	Ampulla of ductus deferens (opened)
4 .	Ductus deferens right
5 .	Seminal vesicle
6 .	Ampulla of ductus deferens
7 .	Middle lobe of prostate (resected to left of midline)
8 .	Internal urethral opening
9 .	Vesical sphincter muscle
10 .	Seminal vesicle (opened)
11 .	Ejaculatory duct (upper pointer indicates confluence of excretory duct of seminal vesicle with ductus deferens, lower pointer indicates opening of ejaculatory duct at seminal colliculus)
12 .	Left lobe of prostate
13 .	Isthmus of prostate (sectioned)
14 .	Upper pointer: Prostatic utricle (opened) Lower pointer: Seminal colliculus
15 .	Prostatic sinus
16 .	Urethral crest