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Components of the digestive system:
- 1. Digestive tract (alimentary canal): oral cavity,pharynx, esophagus, stomach, small intestine, large intestine
- 2. Accessory digestive organs: teeth, tongue, salivary glands, liver, biliary ducts and gall bladder, pancreas
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Oral Cavity
- oral mucosa: stratified squamous epithelium (nonkeratinized)
- oral cavity proper
- vestibule
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palate
- hard palate- bone
- soft palate- muscle
- uvula
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Fauces
- anterior arch
- posterior arch
- palatine tonsil
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Tongue
- frenulum
- extrinsic muscles: move the tongue around - genioglossus
- intrinsic muscles: change the shape of the tongue
- anterior 2/3(body): mobile
- papillae: filiform, fungiform, circumvallate
- filifoorm: stratified squamous epithelium (keratinized)
- fungiform: dorsal tastebuds
- circumvallate: taste buds in wall of trough
- taste bud structure:
- posterior 1/3: (root): attatched to hyoid bone
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