The epithelial tissue that lines the urinary bladder and can stretch to accommodate urine is called?

The epithelial tissue that lines the urinary bladder and can stretch to accommodate urine is called?

• A. Simple squamous
• B. Transitional epithelium
• C. Stratified squamous
• D. Pseudostratified columnar

Answer: (B)

Transitional epithelium is the tissue that lines the urinary bladder and has the remarkable ability to stretch as the bladder fills. This urothelium forms multiple cell layers when the bladder is relaxed, with dome-shaped surface cells. As the bladder expands, those surface cells flatten and the tissue becomes thinner, yet it still provides a watertight, protective barrier against urine. This adaptability is what lets the bladder hold large volumes without tearing. Other options don’t fit because simple squamous is a single, flat layer suited for diffusion in places like lungs and blood vessels; stratified squamous is multiple layers optimized for abrasion protection in skin and some mucous membranes but not for stretching to accommodate urine; pseudostratified columnar lining is found in respiratory and some reproductive tracts and isn’t designed for bladder stretch.

Transitional epithelium is the tissue that lines the urinary bladder and has the remarkable ability to stretch as the bladder fills. This urothelium forms multiple cell layers when the bladder is relaxed, with dome-shaped surface cells. As the bladder expands, those surface cells flatten and the tissue becomes thinner, yet it still provides a watertight, protective barrier against urine. This adaptability is what lets the bladder hold large volumes without tearing.

Other options don’t fit because simple squamous is a single, flat layer suited for diffusion in places like lungs and blood vessels; stratified squamous is multiple layers optimized for abrasion protection in skin and some mucous membranes but not for stretching to accommodate urine; pseudostratified columnar lining is found in respiratory and some reproductive tracts and isn’t designed for bladder stretch.