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Keratinized Oral Mucosa

Keratinization of stratified squamous epithelium may occur at sites in the oral cavity where the mucosa is subjected to habitual mechanical stress - such as continuous trauma from chewing. This response is similar to the formation of a callus on the hands of a manual laborer. Note the typical appearance of the stratum corneum (A). No nuclei are visible in contrast with the parakeratinized variety. Re-identify the other structures labelled.



A - stratum corneum
B - connective tissue papilla

C - epithelial rete peg
D - lamina propria

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