An epithelial tissue which has thin flat cells arranged edge to edge so as to…

Epithelial tissue is classified mainly by the shape of its cells and how they are arranged. Squamous epithelium is made of thin, flat, plate-like cells fitted tightly edge to edge, giving a smooth tiled appearance -- suited to surfaces where protection or easy diffusion is needed. This differs from cuboidal epithelium (cube-shaped cells, common in secretory or absorptive linings), columnar epithelium (tall column-shaped cells lining absorptive or secretory tracts), and ciliated columnar epithelium (columnar cells bearing hair-like cilia that sweep fluid or particles along the surface).

The stem describes thin, flat cells arranged edge to edge so as to appear like closely packed tiles -- the defining structural signature of squamous epithelium. Among the body linings offered, the inner lining of the cheeks (buccal mucosa) is composed of stratified squamous epithelium: several stacked cell layers whose flattened, plate-like surface cells give the tile-like squamous appearance, providing durability against the constant abrasion of chewing and speech. (In stratified squamous epithelium only the superficial cells are truly flattened; the deeper basal layers are cuboidal to polygonal.)

• Inner lining of Stomach: lined by simple columnar epithelium -- tall, column-shaped cells arranged in a single layer, specialised for mucus secretion rather than a flat tiled surface.

• Outer surface of Ovary: covered by simple cuboidal epithelium (germinal epithelium) -- cube-shaped cells of roughly equal height and width, not thin flat plates.

• Inner lining of Fallopian tube: lined by ciliated columnar epithelium -- tall columnar cells bearing cilia that help move the egg toward the uterus, structurally distinct from flat squamous cells.

So the flat, tile-like cell arrangement described in the stem uniquely fits stratified squamous epithelium, which lines the inner cheeks.