Lecture 5 - Digestion and Absorption NTRN 201 Brainstorm...

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NTRN 201 Digestion and Absorption
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Brainstorm What do you already know about digestion and absorption?
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The Gastrointestinal (GI) Tract Is a flexible muscular tube Extends from mouth to anus Runs through the center of our body It operates like an assembly line in reverse Digestive juices are released The end result of digestion is that it 1. 2. 3.
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Other systems are vital for digestion/absorption: For Transport: Circulatory system consisting of Blood Lymph For Regulation: Hormonal system Nervous system
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The Process of Digestion and Absorption A Step By Step Look
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The GI Tract West Publishing Co.
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Step 1: The Brain Receives a signal from the nervous system
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Step 2: The mouth Mechanical digestion Chemical digestion
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The Swallowing Process Deglutition and peristalsis. (a) In the swallowing process, the tongue rises and presses the bolus of food against the hard palate, thereby forcing it ahead (b) the bolus of food slides past the epiglottis closed over the
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Lecture 5 - Digestion and Absorption NTRN 201 Brainstorm...

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