Dissection of female pelvis froma lateral approach

Sphincter ani externus muscle, close-up view

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Image #159-6
Bassett ImageDiagram Image
Legend Image
Dissection of female pelvis froma lateral approach
Sphincter ani externus muscle, close-up view
The specimen shown in the previous view is here seen in a close-up centered on the sphincter ani externus muscle.
1 . Levator ani muscle (pointer on puborectalis muscle)
2 . Inferior rectal artery (small branch cut off)
3 . Anococcygeal nerve
4 . Anococcygeal ligament
5 . Area of communication between ischiorectal fossae of two sides
6 . Deep part
7 . Superficial part
8 . Subcutaneous part (6-8 refer to the external anal sphincter)
9 . Anus
10 . Longitudinal muscle layer of anal wall
11 . Central tendon of perineum
12 . Vaginal wall
13 . Vestibule of vagina (opened by removal of labia on right side)
14 . Ischiorectal fossa (remnant of anterior recess)
15 . Obturator fascia
16 . Dorsal artery of clitoris
17 . Crus of clitoris
18 . artery of vestibular bulb
19 . Vestibular bulb
20 . Major vestibular gland