part of part of innervated by innervated_by continuous with continuous with Homo sapiens external anal sphincter perineum perineal muscle bulbospongiosus muscle bulbospongiosus SCTID:244972001 The bulbospongiosus is the thick extrapelvic continuation of the urethralis. It originates from the perineal body (and midline raphe over corpus spongiosum in male) and inserts at the superficial perineal membrane and dorsal penile or clitoral aponeurosis. In males, the bulbospongiosus muscles are united and surround the base of the penis. They aid in emptying of urine and ejaculate from urethra. In females, these muscles are separated in the middle by the vagina and act to constrict the vaginal introitus. They can also stop the flow of blood into veins, which maintains an erection in the penis of the male and the clitoris of the female. Its nerve connection is the perineal branch of the pudendal nerve (S2, 3, 4). EMAPA:37454 bulbocavernosus muscle bulbocavernous FMA:19729 bulbospongiosus UBERON:0011389 bulbocavernosus MA:0003116 NCIT:C112234 Wikipedia:Bulbospongiosus_muscle musculus bulbospongiosus perineal nerve