King's Day (formerly Queen's Day) in Amsterdam. King's Day 2016 - Koningsdag 2016 is the Dutch national holiday to be held on Monday 27 April 2016.
Lesson Summary. Transitional epithelium is a layer of cells that form the mucosal lining of your ureters, a portion of your urethra, and your urinary bladder. The cells are stratified, which means they create several layers. These cells provide protection and allow the vessels to expand to accommodate fluid.
Characteristics of epithelium. Epithelial tissues have five main characteristics. 1  Polarity â all epithelia have an apical surface and a lower attached basal surface that differ in structure and function. 2  For this reason, epithelia is described as exhibiting apical basal polarity.