MICROANATOMY

Detailed explanation-1: -Urinary bladder and urethra The bladder expands when it fills up, like a balloon. Nerves in the bladder wall detect the expansion and send a signal to the brain, letting it know that the bladder is full. The urinary bladder can store up to 500 ml of urine in women and 700 ml in men.

Detailed explanation-2: -The bladder is shaped like a pyramid when empty. It becomes more oval as it fills with urine and expands. A smooth muscle called the detrusor surrounds the bladder, and folds called rugae line the interior wall. These structures give the bladder elasticity and allow it to expand.