PATHOLOGY

Detailed explanation-1: -The urinary bladder is a hollow, muscular organ that rests on the pelvic floor. It is also lined with transitional epithelium. The function of the bladder is to collect and store urine from the kidneys before the urine is eliminated through urination.

Detailed explanation-2: -The ureter (one per kidney) is a long, straight, muscle-walled tube. The epithelium lining this tube is stratified, transitional epithelium.

Detailed explanation-3: -The inner mucosa is lined with transitional epithelium and scattered goblet cells that secrete protective mucus. The muscular layer of the ureter consists of longitudinal and circular smooth muscles that create the peristaltic contractions to move the urine into the bladder without the aid of gravity.

Detailed explanation-4: -However, the bladder wall stretches to accommodate the increased volume when the urinary bladder fills with urine. The urothelium reorganizes into two or three layers in the distended bladder without structural damage. Due to this transitional ability of the urothelium, it is also known as the transitional epithelium.