ANAT 216 Lecture Notes - Lecture 12: Left Gastric Artery, Chyme, Curvatures Of The Stomach
13 Oct 2016
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Document Summary
Digestive system: lecture 2 (reading material: chapter 22: page 587; chapter 24: pages 633-634; chapter 25: pages. Swallowing mechanism: phases: food pushed from oral cavity to oropharynx by tongue buccal phase (voluntary): pharyngeal phase (involuntary): elevation of soft palate elevation of larynx against epiglottis constriction of pharynx esophageal phase (involuntary): food moved by peristaltic waves. You can swallow without an epiglottis, the larynx squeezes shut itself because of its muscles in its walls. In a baby, the epiglottis is right next to the soft palate (and this lets it drink and breathe at the same time) In infants, the epiglottis brings that larynx up so it forms a continuous tube with the soft palate. After about a year or two, the larynx starts to descend (which is needed to speak properly) General histological organization of the digestive tract wall: four layers: mucosa (three layers): A serous membrane forming a closed sac containing the peritoneal cavity.
