The Digestive System. A Brief Introduction. YouTube Clip: I can't believe it remix ( The Digestion Song) Travis Finlay http://www.youtube.com/watch?v=SyVcyT-fOao. Learning Goals. I understand the function and stages of the digestive system
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The Digestive System
YouTube Clip: I can't believe it remix ( The Digestion Song) Travis Finlay
Digestion: The process of breaking down food to provide nutrients and energy for growth, repair and reproduction.
a. Physical – Mechanical breakdown of food
b. Chemical – Enzymes and chemicals that breakdown food
3. Absorption – Taking nutrients into cells
4. Egestion – Excretion of waste
Wave like motion from the alternate contraction/relaxation of smooth muscle in the digestive tract.
1. Protects the digestive tract from enzymes
2. Allows the digested material to pass through the tract