Write the characteristics and functions of squamous epithelium.

(N/A) $\rightarrow$ It is composed of a single thin layer of flattened cells with irregular boundaries.
$\rightarrow$ The cells are arranged like tiles on a floor.
$\rightarrow$ They are held together by intercellular cement material.
$\rightarrow$ The cells are typically hexagonal in shape and possess a prominent nucleus in the center.
$\rightarrow$ The primary function of this tissue is to form a diffusion boundary and protect underlying tissues.