Histology of the Alimentary System 0.0 / 5 ? MedicineGastrointestinal SystemUniversityNone Created by: BeccaCreated on: 23-12-13 10:30 What epithelium lines the oral cavity? What are the two types? Stratified squamous epithelium, divided into masticatory (keratinised) & lining (non-keratinised) epithelium 1 of 8 What are the 4 types of tongue papillae & what are their functions? Which type doesn't have taste buds? Circumvallate (sensory), foliate (sensory), fungiform (thermo-regulatory) & filiform (mechanical). Filiform is the only papilla without taste buds 2 of 8 What are the 4 layers of the GI tract? (superficial -> deep) Adventitia/serosa, muscularis propria (circular longitudinal layer), sub-mucosa, mucosa (epithelium, lamina proper, muscularis mucosae) 3 of 8 What is the epithelium & mucosa in the oesophagus? Non-keratinising stratified squamous epithelium, folded lumen, broad sub-mucosa with mucous glands (proximal = lubrication, distal = acid buffering) 4 of 8 What is the epithelium & mucosa in the stomach? Epithelium: mucosal cells, chief cells, parietal cells, enteric doctrine cells. Mucosa: mucus producing & acid + pepsinogen producing, longitudinal folds (especially at greater curve) 5 of 8 What is the epithelium & structural features in the bile system? Tall columnar epithelium, folded mucosa, walls of connective tissue have large number of elastic fibres & distal bundles of smooth muscle 6 of 8 What are the 3 types of cells in the pancreas? Ductal, acinar (exocrine) & islet (endocrine) cells 7 of 8 What are the 3 types of acinar secretory cells? Serous, mucous & mixed acinus 8 of 8
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