Pelvic Floor Muscle group Core The sling of muscles supporting the pelvic organs and forming the perineum. 13 muscles Bulbospongiosus Coccygeus Deep Transverse Perineal External Sphincter Muscle Of Female Urethra External Sphincter Muscle Of Urethra (Disambiguation) Iliococcygeus Ischiocavernosus Pubococcygeus Puboperinealis Puborectalis Pubovaginal Sphincter Ani Externus Superficial Transverse Perineal