PHIL 2130 Lecture Notes - Lecture 19: Submandibular Duct, Frenulum Of Tongue, Epithelial Polarity
6 May 2020
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Document Summary
Digestive tract is used for digestion (mechanical and chemical digestion) of food into small particles, and absorption into the interstitial fluid of the circulatory system. Oral cavity pharynx, esophagus, stomach, small intestine, large intestine. The stomach stores food and is also involved in the chemical digestion of food. Oral cavity: analysis and mechanical digestion of food. The teeth are primarily involved with mechanical digestion. They also lubricate food and are involved in limited digestion. The pancreas has exocrine and endocrine function, and secretes enzymes into the small intestine to help with digestion. Boundaries of oral cavity: roof-has hard and soft palate. Oral mucosa in mouth: has stratified (multiple layers), squamous (flat), non-keratinized epithelium and lamina propia. Salivary glands: produce and secrete saliva (which contains water, ions, enzymes, metabolites and glycoproteins. Paired ducts open into the oral vestibule near the 2nd maxillary molar. Paired ducts open into floor of oral cavity, lateral to lingual frenulum.
