Digestive-6
Terms
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- Pharynx
- The throat, tube starts at the nares to the esophagus posteriorly and the larynx anteriorly
- Nasopharynx
- Superior portion of pharynx; posterior to the nose
- Oropharynx
- Intermediate portion of pharynx; from soft palate to hyoid bone
- Laryngopharynx
- Inferior portion of pharynx; From hyoid bone to esophagus and larynx
- Esophagus
- hollow muscular tube that connects pharynx and stomach
- Length of esophagus
- App. 10"
- Esophageal hiatus
- Where the esophagus pierces the diaphram
- Peristalsis
- Wave, pushes food though esophagus by progression of involuntary coordinated contractions and relaxations
- Mucosa of esophagus
- Nonkeratinized stratified squamous epithelial lining; mucosa gland esp. at distal end
- Muscularis of esophagus
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-Upper 3rd * skeletal muscles
-Middle 3rd * Skeletal + smooth
-Lower 3rd * Esp. of smooth muscles only - Adventia of esophagus
- Not like serosa in that areolar conn. tissue of this layer is not covered by mesothelium- instead the conn. tissue attaches esphagus to tissue of mediastinum