The trigone of the urinary bladder is created by:
A)the internal and external urethral sphincters.
B)the internal and external urethral orifices.
C)the openings to the two ureteral orifices and the internal urethral orifice.
D)the prostatic,membranous,and spongy urethra.

Question

Quizplus · Accepted Answer

The trigone of the urinary bladder is a triangular region of the bladder formed by the two ureteral orifices and the internal urethral orifice. It serves as a landmark for cystoscopic procedures and is important for diagnosis and treatment of urinary tract infections. The internal and external urethral sphincters (A) are muscle groups that control the release of urine from the bladder into the urethra. The internal and external urethral orifices (B) are openings of the urethra, but they do not form the trigone. The prostatic, membranous, and spongy urethra (D) are segments of the male urethra and are not involved in the formation of the trigone.

The Trigone of the Urinary Bladder Is Created By