Definition of urinary bladder
: a membranous sac in many vertebrates that serves for the temporary retention of urine and discharges by the urethra
First Known Use of urinary bladder
Medical Definition of urinary bladder
: a distensible membranous sac that serves for the temporary retention of the urine, is situated in the pelvis in front of the rectum, receives the urine from the two ureters and discharges it at intervals into the urethra through an orifice closed by a sphincter, is lined with transitional hypoblastic epithelium, and develops from the proximal part of the allantois of the embryo
Seen and Heard
What made you want to look up urinary bladder? Please tell us where you read or heard it (including the quote, if possible).