What is the trigone of the bladder bounded by?
a) top of fundus and uretal orifices
b) major and minor calyces
c) orifices of ejaculatory ducts and urethra
d) uretal and internal urethral orifices
The trigone of the bladder is an anatomical region located in the inner lining of the urinary bladder. It is bounded by specific structures, and the correct answer is option (d) uretal and internal urethral orifices.
To understand how to arrive at this answer, we need to have a basic understanding of the anatomy of the bladder. The bladder is a hollow organ that stores urine before it is expelled from the body through the urethra. It has several openings, including two ureters (which carry urine from the kidneys to the bladder) and the urethra (which allows urine to pass out of the body).
The trigone of the bladder refers to a triangular-shaped region located between the openings of the ureters and the urethra. It is considered important because it is relatively smooth compared to the rest of the bladder lining, and it is less prone to stretching during the filling and emptying of urine.
Therefore, to answer the question, we need to identify which option correctly describes the boundaries of the trigone. Option (d) uretal and internal urethral orifices is the correct choice because it accurately represents the openings of the ureters and the urethra, which define the boundaries of the trigone.