PSL301H1 Lecture Notes - Lecture 33: Pylorus, Soft Palate, Swallowing
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Psl301 lecture 33: digestive system overview of the functions and. Mouth, pharynx, esophagus, stomach, small and large intestine. Liver, gall bladder, tongue, teeth, salivary glands, pancreases. Soft palate is going to push up and close off the nasal pharynx. Muscles that going to contract and pull larynx upward help close off trachea. Sphincters in esophagus allow food to pass into the esophagus. Starts when food enters the mouth, teeth and tongue moves it around, break up food into bolus. Initiated when you make a conscious decision to swallow that food. Bolus of food is pushed back to the tongue, into the soft palate, trigger sensory nerves (cranial nerve 9 and. Influence swallowing center in medulla and affect cn v, ix, x and. The lower two third of esophagus are made up of smooth muscle cells. As food pass through the esophagus, one last quick inhalation. Respiration is inhibited once the bolus enters the pharynx.
