ANHB2214 Lecture Notes - Lecture 11: Stratified Squamous Epithelium, Orbicularis Oris Muscle, Trigeminal Nerve
26 Mar 2020
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Lips: orbicularis oris m, supplied by cn7- orbicularis by the facial nerve,, the skin is supplied by the trigeminal nerve. Innervated by branches of facial nerve (buccal and marginal mandibular: blood supply by branches of facial artery (superior and inferior labial arteries, surfaces, thick, stratified squamous epithelium, underlying submucosa. Contains numerous salivary acini of serous mucous amd mixed seromucous types. Lining mucosa with a thick non-keratinised eptihlelium. Many minor labial salivary glands: red vermillion zone of each lip. Is transitional between the oral mucosa and skin. Lacks salivary or sweat glands--- kept moist: external surface. Tongue: mass of striated muscle covered by mucosa, mass of interlacing (oriented in all directions) - bundles of skeletal muscle fibres which permit an extensive range of tongue movements. Innervated by cn xii (hypoglossal nerve: lower surface of tongue , smooth with typical lining mucosa, dorsal surface of tongue .
