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