The primary functions of flattened cells depend on their specific location:
Protection: In the epidermis, flattened cells form a physical barrier that protects underlying tissues from mechanical injury, pathogens, and dehydration. Diffusion: In the alveoli, their thin structure facilitates the rapid exchange of gases between the air and blood. Secretion and Absorption: In certain locations, such as the lining of blood vessels, flattened cells assist in the regulation of substances that pass into and out of the bloodstream.
