ANAT 216 Lecture Notes - Lecture 18: Esophagus, Esophageal Hiatus, Muscularis Mucosae
2 Oct 2017
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Digestive system: lecture 2 (reading material: chapter 22: page 587; chapter 24: pages 633-634; chapter 25: pages. Larynx pokes into anterior wall (2 grooves called piriform fossa/recess) piriform fossa (recess) Where people get stuff stuck in their throat. Contract and propel food from larynx to esophagus superior, middle, inferior pull the walls of the pharynx inward during swallowing. Upper esophageal sphincter stays closed most of the time and helps prevent reflux of food from esophagus up to pharynx. When you burp, you push air from esophagus to pharynx and sphincter acts like vocal cords to produce sound. If you have pharynx removed, you have to vocal cords and so can speak through esophageal sphincter. Epiglottis when a baby swallows, their larynx elevates and so the epiglottis guides larynx into nosolarynx. Allows baby to breathe and swallow at the same time (obligate breathing). Baby"s epiglottis is almost touching soft palate, right behind tongue.
