NEET BIOLOGY

Detailed explanation-1: -The soft tissues of the human oral cavity and esophagus are covered everywhere by a stratifying squamous epithelium (1). In regions subject to mechanical forces associated with mastication (i.e., the gingiva and hard palate) there is a keratinizing epithelium resembling that of the epidermis covering the skin.

Detailed explanation-2: -The epithelium lining of the adult esophagus is squamous and stratified.

Detailed explanation-3: -The entire surface of the oral mucosa is covered by squamous stratified epithelium.

Detailed explanation-4: -The esophagus contains four layers-the mucosa, submucosa, muscularis, and tunica adventitia. The mucosa is made up of stratified squamous epithelium containing numerous mucous glands. The submucosa is a thick, loose fibrous layer connecting the mucosa to the muscularis.