Urethral crest

Urethral Crest

The urethral crest is a longitudinal ridge located on the posterior wall of the prostatic urethra. It is an important anatomical feature in the male reproductive system.

Anatomy

The urethral crest is a prominent structure that runs along the midline of the prostatic urethra. It is formed by the elevation of the mucous membrane and is most pronounced in the region of the seminal colliculus, also known as the verumontanum. The seminal colliculus is a rounded eminence where the ejaculatory ducts open into the urethra.

The urethral crest serves as a landmark for the openings of the prostatic ducts, which are located in the grooves on either side of the crest. These ducts are responsible for the secretion of prostatic fluid, a component of semen.

Function

The urethral crest plays a role in the regulation of the flow of urine and semen through the urethra. During ejaculation, the crest helps to direct the flow of semen into the urethra while preventing the backflow of urine.

Clinical Significance

The urethral crest can be involved in certain medical conditions. For example, hypertrophy of the prostate gland can lead to compression of the urethra, affecting the urethral crest and potentially causing urinary obstruction. This condition is known as benign prostatic hyperplasia (BPH).

Images

Diagram of the male urethra, showing the location of the urethral crest.

Illustration of the prostatic urethra, highlighting the urethral crest.

Anatomy of the prostate gland, with the urethral crest indicated.

Related Pages

• Prostatic urethra
• Seminal colliculus
• Benign prostatic hyperplasia
• Ejaculatory duct

References

• Moore, K. L., Dalley, A. F., & Agur, A. M. R. (2013). Clinically Oriented Anatomy. 7th edition. Lippincott Williams & Wilkins.
• Standring, S. (2015). Gray's Anatomy: The Anatomical Basis of Clinical Practice. 41st edition. Elsevier.

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  Urethral crest

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  Prostatic urethra

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  Prostate