Definitions for urinary bladder
Random House Webster's College Dictionary
a distensible, muscular sac in most vertebrates, in which urine is retained until discharged from the body.
Category: Anatomy, Zoology
Ref: Also called bladder. 1 2
Origin of urinary bladder:
a membranous sac for temporary retention of urine
An elastic, muscular sac situated in the pelvic cavity, into which urine from the kidneys is stored prior to disposal by urination. Urine enters the bladder via the ureters and exits via the urethra.
U.S. National Library of Medicine
A musculomembranous sac along the URINARY TRACT. URINE flows from the KIDNEYS into the bladder via the ureters (URETER), and is held there until URINATION.
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