Sorry for reposting but I really need help with this question and I've waited several hours.
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
d) uretal and internal urethral orifices vesical trigone is bounded by the openings of the ureters (2) superolaterally, the interureteric ridge between the openings of the ureters and the internal urethral orifice inferiorly (Greek, trigone = triangle)
//anatomy.med.umich.edu/reproductive_system/pelvicvisc_tables.html
Thank you very much! I really appreciate it!
No problem! I'm here to help. To answer your question, it's important to understand what the trigone of the bladder is and what it is bounded by.
The trigone of the bladder is a triangular area on the inner surface of the bladder. It is defined by three openings or orifices:
- The ureteral orifices: These are the openings through which urine flows from the kidneys into the bladder. They are located at the base corners of the trigone.
- The internal urethral orifice: This is the opening through which urine exits the bladder and enters the urethra. It is located at the apex of the trigone.
So, to identify what the trigone of the bladder is bounded by, we need to determine what structures are related to the ureteral and internal urethral orifices.
Let's go through the options:
a) Top of fundus and ureteral orifices: The top of the fundus is not related to the trigone, and while ureteral orifices are indeed part of the trigone, there is no mention of the third opening, which is the internal urethral orifice. So, this option is not correct.
b) Major and minor calyces: The major and minor calyces are parts of the kidney's drainage system, not related to the trigone. This option is also not correct.
c) Orifices of ejaculatory ducts and urethra: The orifices of ejaculatory ducts refer to the male reproductive system and are not related to the trigone of the bladder. Thus, this option is incorrect.
d) Ureteral and internal urethral orifices: This option correctly identifies both ureteral and internal urethral orifices as the boundaries of the trigone of the bladder. Therefore, the correct answer is option d.
To summarize, the trigone of the bladder is bounded by the ureteral and internal urethral orifices, including the openings for urine entry from the kidneys and urine exit to the urethra.