4th Grade-Ch. 5 Lesson 3 What are the Digestive and Nervous systems
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Transcript of 4th Grade-Ch. 5 Lesson 3 What are the Digestive and Nervous systems
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Ch. 5 Lesson 3Ch. 5 Lesson 3What are the digestive & What are the digestive &
nervous systems?nervous systems?
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digestion• Process that breaks food
into forms that your cells can use
YouTube video-Bill Nye digestion song
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Where does digestion begin?
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Path of digestion
1. mouth- chew food using teeth
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•Saliva in mouth begins chemical break down of food
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2. ESOPHAGUS
• Muscular tube that connects mouth stomach
• Smooth muscles contract & move food down
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3. STOMACH•smooth muscles mash food
•mix w/ juices & form thick liquid
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4. SMALL INTESTINE• most digestion occurs here
Journey to the Small Intestine
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5. LARGE INTESTINE
•removes water & stores solid waste
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mouth•Digestion begins in your _________.
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esophagus
•The food you swallow enters a tube called the ______________________.
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Smooth•__________ muscles in the walls of the esophagus contract and move food toward your stomach.
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mash
•Smooth muscles in the walls of the stomach _______ the food.
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small intestine
•Most digestion takes place in the ______________
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liquid
•The large intestine removes much of the ______ and stores the solid waste until it leaves the body.
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central nervous system
•control center of body
•brain & spinal cord
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neuron•nerve cell
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reflex
• quick, automatic response