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Unformatted text preview: unction to produce children Insert Figure 4.21 GI Tract
Muscular tube that
extends from mouth to
Bioavailability Extent to which
digestive tract absorbs
nutrients and how well
body uses them Mouth
Digestion begins in the mouth
– Biting and grinding actions of teeth
pieces. breaks and mashes food into smaller Chemical digestion
– Saliva mixes and lubricates food.
– Salivary amylase and lipase begin
breakdown of starch and fat, respectively. Taste and Smell of Foods
– Specialized sensory structures
on the tongue and in the lining of
mouth and throat Five Tastes: Sweet, sour, salty,
bitter, and umami Smell
– Chemicals in food become airborne and stimulate nasal
passages, contributing to sense of
taste Insert photo of girl with ice cream page 96 From the Mouth to the
Esophagus – Tube connecting pharynx to
stomach Epiglottis – Flap that folds down over trachea
(windpipe) when you swallow Gastroesophageal sphincter – Located at the
end of the esophagus; controls...
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This note was uploaded on 03/27/2013 for the course FOOD AND N 254 taught by Professor Varnon during the Spring '13 term at Southeast Missori State University.
- Spring '13