Write about transitional epithelium and its use

Transitional epithelium :
(a) It consists of many layers of cells, which are thin and stretchable.
(b) It is made up of a single layer of cuboidal cells at j the base, two or three middle layers of polygonal
or pear-shaped cells and an outer most layer of rectangular and oval cells.
Use : It is present over urinary bladder and helps in its expansion duing urine storage.