ANATOMY

Detailed explanation-1: -Simple: A simple epithelium means that there’s only one layer of cells. Stratified: A stratified epithelium is made up of more than one layer of cells.

Detailed explanation-2: -The types of epithelia are classified by the shapes of cells present and the number of layers of cells. Epithelia composed of a single layer of cells is called simple epithelia; epithelial tissue composed of multiple layers is called stratified epithelia.

Detailed explanation-3: -Stratified squamous epithelium consists of a single basal layer containing stem cells, 2–3 layers of proliferative basaloid cells in the suprabasal region, and larger keratinized cells toward the surface. The esophageal squamous epithelium is nonkeratinizing, i.e., it does not have a stratum corneum.

Detailed explanation-4: -In the epidermis of skin in mammals, reptiles, and birds, the layer of keratin in the outer layer of the stratified squamous epithelial surface is named the stratum corneum. Stratum corneum is made up of squamous cells which are keratinized and dead.

Detailed explanation-5: -stratum basale. stratum spinosum. stratum granulosum. stratum lucidum (specific to thick skin) stratum corneum.