urinary bladder

• urinary bladder

  a muscular sac that holds urine
• Location of urinary bladder

  males: prostate inferior to bladder neck

  female: anterior to vagina and uterus
• trigone 


  openings for ureters and urethra

  lots of infections happen here
• mucosa

  transitional epithelial mucosa
• muscular layer

  three layers of smooth muscle
• fibrous adventitia

  everywhere except on superior surface where peritoneum covers it
• urine storage

  collapses when empty

  expands and rises

  full bladder is 12 cm long, and can hold 500 mL
• muscularis is called the

  detrusor muscle