Mesentary - Epithelium on the ventral surface is smooth...

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Digestive System Mesentary Mouth (Oral Cavity,Buccal Cavity) * Lips - assist in speech and help keep food in the mouth between the upper and lower teeth. * Hard palate -the roof of the mouth that consist of the maxillae and palatine bones. * Soft palate , a sheet of muscular tissue, compose the remaining posterior portion of the roof. * Uvula - a soft tissue projection that hangs from the soft palate. When swallowing, the soft palate and uvula draws up preventing food from entering the nasal cavity. * Oral orfice- anterior opening * Fauces - the opening of the mouth that leads to the throat (oropharynx). * Pair of muscular arches on each side of the oral cavity * Palatoglossal arch- anterior * Palatopharyngeal arch- posteiror * Muscular organ consisting of connective tissue and interlacing bundles of skeletal muscle fibers covered by a mucus membrane. * The distribution and random orientation of individual skeletal muscle fibers allows increased movement during chewing, swallowing, and speaking
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Unformatted text preview: * Epithelium on the ventral surface is smooth * Dorsal surface is rough because of numerous elevations or projections called papillae * 4 types of papillae * Filiform * Foliate * Fungiform * vallate Tongue * Maneuvers the food for chewing, shapes it into a round mass (bolus), and moves it to the back of the mouth for swallowing. * Frenulum- a fold of mucous membrane in the midline of the undersurface of the tongue that limits its posterior movement. * Papillae- projections on the side and posterior surface of the tongue, some of which contain taste buds. Tongue * Skeletal muscle running three different ways * von Ebner's Glands & Skeletal Muscle Fibers Notice the tri-directional arrangement of the muscle fibers. H&E, 40x Taste (Gustation) * A sensation that results from the action of chemicals on the taste buds * About 4,000 taste buds located on the tongue, cheeks, soft palate, pharynx, and epiglottis Digestive System Taste Buds...
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This note was uploaded on 01/30/2012 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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Mesentary - Epithelium on the ventral surface is smooth...

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