MICROANATOMY

Detailed explanation-1: -When the bladder is empty, the mucosa has numerous folds called rugae. The rugae and transitional epithelium allow the bladder to expand as it fills. The second layer in the walls is the submucosa, which supports the mucous membrane. It is composed of connective tissue with elastic fibers.

Detailed explanation-2: -Structure of the Bladder Wall The smooth muscle (detrusor) of the bladder wall is protected by an external serosa and on the vesical face overlain by a mucosa that itself consists of a tight transitional epithelium (urothelium), basement membrane and sub-urothelium (fig. 1A).

Detailed explanation-3: -Lining epithelium: The urinary bladder lining is a specialized stratified epithelium, the urothelium.

Detailed explanation-4: -The primary function of the detrusor muscle is to contract during urination to push the urine out of the bladder and into the urethra. The detrusor muscle will relax to allow the storage of urine in the urinary bladder.