BIO 12D Lecture Notes - Lecture 8: Stratified Squamous Epithelium, Palatoglossal Arch, Frenulum Of Tongue
15 May 2020
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Hard palate: anterior two-thirds of the palate, hard and bony, formed by maxillae and palatine bones, covered w/ dense ct and nonkeratinized stratified squamous epithelum. Soft palate: posterior one-third, soft and muscular, primarily composed of skeletal muscle covered w/ nonkeratinized stratified squamous epithelium, extending inferiorly from the posterior part of the soft palate is the uvula. When swallowing, the soft palate and the uvula elevate to close off the opening of the nasopharynx. Fauces represent the opening between the oral cavity and the oropharynx. Fauces are bounded by paired muscular folds: glossopalatine arch (anterior fold, pharyngopalatine arch (posterior fold) Palatine tonsils are housed between the arches. Formed from: skeletal muscle, covered with lightly keratinized stratified squamous epithelium. Manipulates and mixes ingested materials during chewing. Forms the bolus: a globular mass of partially digested material. Inferior surface of the tongue: attaches to the floor of the oral cavity, by the lingual frenulum. Numerous small projections (papillae) cover the superior (dorsal) surface.
