Skip to Content

muscular layer of prostatic urethra

 

Definition: relatively thin inner coat of smooth (involuntary) muscle bundles, both circularly and longitudinally arranged and separated from the epithelium by a thin vascular stroma of fibroelastic connective tissue, which are continuous inferiorly with those of the intermediate urethra and peripherally with the fibromuscular tissue of the prostate, including a relatively thick, troughlike layer of skeletal (voluntary) muscle that ascends the anterior aspect of the prostatic urethra to the neck of the bladder as part of the external urethral sphincter; proximal (superior) to the seminal colliculus, which bears the openings of the ejaculatory ducts, the circular layer of smooth muscle is especially prominent as a continuation of the internal urethral sphincter of the intramural or preprostatic part of the urethra.

Synonym(s): tunica muscularis partis prostaticae urethrae masculinaeTA, muscular coat of intermediate part of male urethra, muscular coat of prostatic urethra

See Also: external urethral sphincter of male, internal urethral sphincter

Disclaimer: This site is designed to offer information for general educational purposes only. The health information furnished on this site and the interactive responses are not intended to be professional advice and are not intended to replace personal consultation with a qualified physician, pharmacist, or other healthcare professional. You must always seek the advice of a professional for questions related to a disease, disease symptoms, and appropriate therapeutic treatments.
© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
Hide