Which epithelium lines the urinary bladder?

Which epithelium lines the urinary bladder?

• A. Transitional epithelium
• B. Simple columnar
• C. PCCE
• D. Simple cuboidal epithelium

Answer: (A)

Transitional epithelium is the lining of the urinary bladder. This tissue is stratified and highly expandable, built to accommodate the bladder’s large changes in volume. Surface umbrella cells form a protective, dome-shaped layer that can flatten as the bladder fills, allowing the epithelium to stretch without tearing. It also includes tight junctions and specialized proteins to maintain a barrier against urine. Other epithelia, like simple columnar or simple cuboidal, don’t provide the same stretchability or protective barrier, and pseudostratified ciliated columnar epithelium lines the respiratory tract, not the bladder.

Transitional epithelium is the lining of the urinary bladder. This tissue is stratified and highly expandable, built to accommodate the bladder’s large changes in volume. Surface umbrella cells form a protective, dome-shaped layer that can flatten as the bladder fills, allowing the epithelium to stretch without tearing. It also includes tight junctions and specialized proteins to maintain a barrier against urine. Other epithelia, like simple columnar or simple cuboidal, don’t provide the same stretchability or protective barrier, and pseudostratified ciliated columnar epithelium lines the respiratory tract, not the bladder.