INTRODUCTION TO THE DIGESTIVE SYSTEM

From food to Fuel

VIDEO CLIP

Digestion Video Clip

WHAT 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?

OVERVIEW OF THE DIGESTIVE SYSTEM

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

OVERVIEW OF THE DIGESTIVE SYSTEM

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 canalAccessory organs

Food is ingested processed in the digestive tract→ undigested food leaves the system as feces

LABEL THE DIAGRAM

FOR NEXT CLASS PLEASE WATCH

http://www.pennmedicine.org/encyclopedia/em_DisplayAnimation.aspx?gcid=000097&ptid=17

What is this tissue? How do you know?