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21 Cards in this Set
- Front
- Back
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Components of the Digestive System |
1. Digestive Tract (oral cavity, pharynx, esophagus, stomach, small & large intestine, anus) 2. Accessory Organs (teeth, tongue, salivary glands, pancreas, spleen, gall bladder, biliary ducts) |
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Functions of digestive tract? |
- Ingestion - Mechanical / Chemical processing -Digestion -Secretion -Absorption -Excretion -Compaction -Defense |
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Oral Cavity Mucosa |
Non-keratinized Stratified Squamous |
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Oral Cavity Proper |
Space in the middle of the mouth (between the teeth) |
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Oral Cavity Vestibule |
Space between cheeks/lips and teeth |
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Hard Palate |
Core = bone of palatine and maxillary
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Soft Palate -What/where is it? -What is its function? |
Posterior to hard palate, Core of skeletal muscle -Closes off nasopharynx when swallowing -Seperates oral and nasal cavities |
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Uvula -What/where is it? -What is its function? |
-Dangling at back of throat, extension of soft palate - muscle fibers and CT -Prevents food from entering nasopharynx |
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Fauces |
entrance to oropharynx (opening at back of throat, surrounded by soft palate, paltoglossal arches & tongue) |
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Anterior (palatoglossal) arches |
-Extend between soft palate and tongue = palatoglossal muscle + mucous membrane + associated tisues |
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Posterior (palatopharyngeal) arch |
-Extend between soft palate to sde of pharynx = palatopharyngeal muscle + mucous membrane + associated tissues |
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Palatine Tonsil |
- located in the fauces -Seperates palatopharyngeal and palatoglossal arches |
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Pharyngeal Tonsil |
Posterior side of nasopharynx |
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Lingual Tonsil |
At posterior base of tongue
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Tongue Functions |
-Mechanical processing - Manipulating food -Sensory analysis -Secretion of enzymes (for digestion)
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Frenulum |
Thin fold of mucous membrane between tongue and oral floor, prevents extreme movements |
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Intrinsic Muscles of Tongue - Name (3) - Function - Innervation |
1. Longitudinal 2. Transverse 3. Vertical - Assist extrinsic muscles in fine movements (speech) -Hypoglossal nerve (CN12)
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Extrinsic Muscles of Tongue -Name (4) -Function -Innervation |
1. Genio-glossus 2. Hyo-glossus 3. Palato- glossus 3. Stylo-glossus -Gross movements of tongue -Hypoglossal nerve (CN12) |
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Anterior 2/3 of Tongue |
Oral Portion -mobile -covered in Papillae |
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Posterior 1/3 of Tongue |
Root -attached to hyoid bone |
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Papillae - epithelium - Function - 3 Types - # of tastebuds |
-stratified squamous epithelium - Provide friction, have taste buds on them 1. Filiform --> thin, ~5 taste buds 2. Fungiform --> mushroom 3. Circumvallate --> dome, ~100 taste buds
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