END 1 Lab 3: Female Pelvis and Genitalia

Female Pelvis and Genitalia: Module 1 Page 2 of 7

The erectile tissues of the urogenital triangle are overlain by the following perineal muscles:

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	Add the ischiocavernosus muscles, which cover the corpus cavernosa. These erectile bodies converge at the midline to form the glans clitoris.
	Add the bulbospongiosus muscles, which cover and surround the remaining components of the vestibule.

Note that the urethral orifice lies just posterior to the glans clitoris. This anatomical relationship is a key landmark during urinary catheterization in female patients.

Add the external anal sphincter.

	What are the three muscular components of the external anal sphincter?
Deep part: encircles the superior part of the anal canal and blends with the puborectalis portion of the levator ani. Superficial part: attaches anteriorly to the perineal body and posteriorly to the coccyx by the anococcygeal ligament. Subcutaneous part: the most superficial portion, encircling the anal opening just beneath the skin. Identify them in the MPR window.