MICROANATOMY

Detailed explanation-1: -Transitional epithelium, elastic fibers, and visceral muscle tissue in the walls of the urinary bladder contribute to its distensibility and elasticity, allowing it to easily stretch and return to its original size several times each day.

Detailed explanation-2: -The urothelium represents the first line of bladder defense and an interface between pathogens and defense mechanisms. Functions of the urothelium include control of permeability, immune responses and cell-cell communication, which seems to play a pivotal role in responding to injuries and infections.

Detailed explanation-3: -Transitional epitheliumis a type of tissue consisting of multiple layers ofepithelial cells which can contract and expand. It is so named because of this function in the transition of degree of distension.