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The bulbospongiosus muscles (in older texts bulbocavernosus and, for female muscle, constrictor cunni) are a subgroup of the superficial muscles of the perineum. [1] They have a slightly different origin, insertion and function in males and females. In males, these muscles cover the bulb of the penis, while in females, they cover the vestibular ...
The bulb of penis is the proximal/posterior bulged [1] end of the (unpaired median) corpus spongiosum penis.Together with the two crura (one crus on each side of the bulb), it constitutes the root of the penis. [2]
The structure of the penis is supported by the pelvic floor muscles. Anatomical diagram of the penis. The urethra, which is the last part of the urinary tract, traverses the corpus spongiosum (spongy urethra) and opens through the urinary meatus on the tip of the glans. Muscles underlying the penis and perineum
Muscles Superficial transverse perineal muscle; Ischiocavernosus muscle; Bulbospongiosus muscle; Penile crura / clitoral crura; Bulb of penis / vestibular bulbs; Urogenital diaphragm; Muscular perineal body; Superficial and deep perineal pouch; Blood vessels and lymphatics
The function of the muscle is fixation of the perineal body (central tendon of perineum), support of the pelvic floor, expulsion of semen in males and last drops of urine in both sexes. [2] The deep transverse perineal muscle lies in the same plane as the urethral sphincter and formerly the two muscles were described together as the constrictor ...
The superficial perineal pouch is an open compartment, due to the fact that anteriorly, the space communicates freely with the potential space lying between the superficial fascia of the anterior abdominal wall and the anterior abdominal muscles:
The ischiocavernosus and bulbospongiosus muscles contract to compress the dorsal vein of the clitoris to stop drainage of the clitoris, trapping the blood. [6] The erectile tissues are composed of endothelium-lined vascular spaces in a trabecular matrix, with the endothelium -lined vascular spaces surrounded by smooth muscle capable of ...
The anal triangle can be defined either by its vertices or its sides.. Vertices. one vertex at the coccyx bone; the two ischial tuberosities of the pelvic bone; Sides. perineal membrane (posterior border of perineal membrane forms anterior border of anal triangle)