external urethral sphincter of male
Definition: composed of striated (voluntary) muscle, includes a tubelike portion that encircles the membranous urethra, but also has a troughlike portion that ascends the anterior aspect of the prostatic urethra to the neck of the bladder and a part that passes anteriorly to the membranous urethra and attaches to the ischial rami on each side (compressor urethrae muscle).
Synonym(s): musculus sphincter urethrae externus masculinaeTA
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