Anatomical feratures of prostatic Urethra are following except?
**Core Concept**
The prostatic urethra is a unique anatomical structure that differs from the rest of the urethra in terms of its histological features and surrounding structures. It is a short, narrow tube that passes through the prostate gland, receiving urine from the bladder and connecting to the membranous urethra.
**Why the Correct Answer is Right**
The prostatic urethra has a distinctive feature known as the urethral crest, which is a longitudinal ridge in the posterior wall of the urethra. This crest gives rise to the prostatic sinuses, which are small depressions on either side of the crest that receive prostatic ducts. The prostatic urethra also has a pair of lateral lobes and the seminal colliculus, which is a raised area near the base of the prostatic urethra where the ejaculatory ducts open. These features are characteristic of the prostatic urethra and distinguish it from other parts of the urethra.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the prostatic urethra does have a urethral crest, which is a distinctive feature of this part of the urethra.
* **Option B:** This option is incorrect because the prostatic sinuses are indeed depressions on either side of the urethral crest that receive prostatic ducts.
* **Option C:** This option is incorrect because the seminal colliculus is a raised area near the base of the prostatic urethra where the ejaculatory ducts open.
**Clinical Pearl / High-Yield Fact**
The prostatic urethra is a critical area for urologists to understand, as it is the site of many urological procedures, including transurethral resection of the prostate (TURP).
**Correct Answer:** D.