Pelvic floor
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The pelvic floor or pelvic diaphragm is composed of muscle fibers of the levator ani, the coccygeus muscle, and associated connective tissue which span the area underneath the pelvis. The pelvic diaphragm is a muscular partition formed by the levatores ani and coccygei, with which may be included the parietal pelvic fascia on their upper and lower aspects. The pelvic floor separates the pelvic cavity above from the perineal region (including perineum) below. Because, to accommodate the birth canal, a female's pelvic cavity is larger than a male's, the pelvic floor tends to be considered a part of female anatomy, but males have an equivalent pelvic floor.
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