Transitional Epithelium permits expansion and recoil after stretching without damage. It's found in the urinary bladder, renal pelvis, and ureters. It's called transitional because the appearance of the epithelium changes as stretching occurs.

Squamous epithelium is also called as the pavement epithelium.

The epithelium, lamina propria, and muscularis mucosae are levels of the mucosa, which is the innermost layer of the gastrointestinal (GI) tract. The mucosa is responsible for absorption and secretion.

simple squamous epithelium

pseudostratified ciliated columnar epithelium