ANATOMY

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: -The wall of the bladder is comprised of smooth muscle fibers oriented in multiple different directions. These smooth muscle fibers are collectively known as the detrusor muscle. This interwoven orientation provides the bladder with the ability to stretch in response to the presence of urine.

Detailed explanation-3: -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-4: -Transitional Epithelium Function Transitional epithelial tissue can expand and stretch, which allows the urinary bladder to expand as it is filled with urine.

Detailed explanation-5: -The first layer is the lining on the inside of your bladder. It is called the transitional epithelium or urothelium. The second layer is a thin layer of connective tissue called the lamina propria. The third layer is muscle tissue called the muscularis propria. The fourth layer is fatty connective tissue.