A woman’s bladder is located within the pelvic cavity, and when it is not filled with urine, it cannot be seen or felt on the surface of the body, and is entirely in the position of a small pelvic cavity. When the stored urine reaches a certain amount, it will exceed the pelvic plane, and a bulging bladder can be palpated in the suprapubic and lower abdominal area, or the boundaries of the bulging bladder can be seen, and there can be a mild sensation of urination when pressed with the hand, or a sensation of holding in the bladder. When the bladder is completely collapsed, it is surrounded by fatty tissue and is connected above to the bilateral ureters, which collect urine left behind by the kidneys and store it in the bladder. It is connected below to the posterior urethra, and when a certain amount of urine is stored in the bladder, this releases a signal to urinate, the muscles of the bladder contract, and the posterior urethra opens so that the urine is expelled from the body, completing the act of urination. The sides are adjacent to the pelvic wall and are surrounded by fatty tissue.