Digestive System Part II: Mouth, Teeth, Salivary Glands
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| Mouth/Oral Cavity/Buccal cavity | show 🗑
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| show | form the anterior border of mouth; core and bulk consists of orbicularis oris skeletal muscle
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| show | gums; surround bases of teeth
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| Vestibule | show 🗑
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| Palate | show 🗑
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| show | forms the anterior portion of the roof of the mouth
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| show | forms the posterior portion of the roof of the mouth; posterior inferior tip is the uvula
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| Uvula | show 🗑
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| show | form lateral borders of mouth; core and bulk consist of skeletal muscle called the buccinator muscle
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| Tongue | show 🗑
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| show | compact mass of food and saliva formed by tongue movements; pushed into oropharynx by tongue
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| Lingual frenulum | show 🗑
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| show | covers most posterior part of tongue which lies in the oropharynx
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| show | peg-like projections on superior surface of tongue; taste buds are located on the sides of some of them
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| Teeth | show 🗑
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| Mastication | show 🗑
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| show | where teeth are located/lie
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| show | first set of teeth; emerge by about 2 yrs of age and totals 20 teeth; as permanent teeth enlarge/develop, roots of this set of teeth are reabsorbed causing teeth to fall out between 6 & 12 y.o.
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| Permanent teeth | show 🗑
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| 2 incisors, 1 canine, 2 premolars, 3 molars | show 🗑
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| Impacted teeth | show 🗑
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| show | innervate upper teeth; branches of the maxillary division of the trigeminal nerve (cranial nerve V)
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| Inferior alveolar nerves | show 🗑
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| Two regions of a tooth | show 🗑
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| Crown | show 🗑
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| Enamel | show 🗑
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| Root | show 🗑
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| Dentin | show 🗑
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| show | covers external surface of root; calcified connective tissue, attached to the periodontal ligament
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| Periodontal ligament | show 🗑
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| Pulp cavity | show 🗑
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| show | contents of pulp cavity; consists of nerves and blood vessels; can become infected when a tooth has a crack or deep cavity
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| show | where the pulp cavity extends into the root; narrow; provides a route for blood vessels and nerves to enter and exit the pulp cavity
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| Root canal therapy | show 🗑
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| show | result from gradual demineralization of enamel & dentin by bacterial action; decay begins w/ accumulation of dental plaque, film of sugar, bacteria and debris; metabolism of trapped sugar by bacteria produces acids which dissolve calcium salts from teeth
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| show | produce saliva (mixture of water, mucus, enzymes); enzymes begin digestion; some are scattered in mucosa of mouth, but 3 pairs of large extrinsic lie outside oral cavity and connect via ducts-parotid, submandibular, sublingual
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| show | largest of the salivary glands; lies anterior to ear, between masseter muscle and skin; mumps will cause the gland to swell
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| show | a viral infection whose symptoms include inflammation and swelling of the parotid salivary gland
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| Submandibular salivary gland | show 🗑
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| show | salivary gland in floor of oral cavity, under the tongue
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