I NTRODUCTION TO THE D IGESTIVE S YSTEM From food to Fuel.

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Presentation transcript:

I NTRODUCTION TO THE D IGESTIVE S YSTEM From food to Fuel

V IDEO C LIP Digestion Video Clip

W HAT DO YOU KNOW ABOUT THE DIGESTIVE SYSTEM ? What are the functions of the digestive system? What organs are included in this system? What do they do specifically?

O VERVIEW OF THE D IGESTIVE S YSTEM GI/Digestive System digests food and transports nutrients into the blood Breaks down food chemically and mechanically to promote absorption through the digestive tract wall (epithelium) and into the blood or lymph Proteins, lipids and carbs must be digested to be absorbed Vitamins and minerals can be absorbed directly into the body from the digestive system Both secretions and muscular action of the digestive system are needed

O VERVIEW OF THE D IGESTIVE S YSTEM Hunger and satiety controlled by hormones and other chemicals that affect the hypothalamus control centre for ingestion Social factors and availability Digestive system consists: of two components: The Alimentary canal Accessory organs Food is ingested  processed in the digestive tract→ undigested food leaves the system as feces

L ABEL THE DIAGRAM

F OR N EXT C LASS P LEASE W ATCH splayAnimation.aspx?gcid=000097&ptid=17 What is this tissue? How do you know?

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