2.3 - Eating disorders and 2.4 - The digestive system

Today's lesson
1. Discuss HW questions
2. Eating disorders
3. Begin the Digestive System
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Slide 1: Diapositive
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Today's lesson
1. Discuss HW questions
2. Eating disorders
3. Begin the Digestive System

Slide 1 - Diapositive

Eating disorders
Anorexia nervosa:  lose extreme amounts of weight
Bulimia nervosa:  vomit to get rid of the food, use large amounts of laxatives
Binge eating disorder: moments of eating a lot 

Slide 2 - Diapositive

Slide 3 - Vidéo

2.5 The digestive system

Slide 4 - Diapositive

2.6 The digestive system

Slide 5 - Diapositive

Digestion
Digestion: Breakdown of food molecules into small food molecules 

When food is digested it is absorbed  

Slide 6 - Diapositive

Big vs. Small
Big molecules -> Insoluble can not get through the gut wall

Small molecules -> Soluble can get through the gut wall

Slide 7 - Diapositive

Fases of digestion. Put them in the right order.
1
2
3
4
digestion
ingestion
absorption
egestion

Slide 8 - Question de remorquage

FASES OF DIGESTION:
  • INGESTION
  • CHEMICAL AND MECHANICAL DIGESTION
  • ABSORPTION
  • EGESTION

Slide 9 - Diapositive

CHEMICAL DIGESTION:
  • BREAKING THE FOOD INTO EVEN SMALLER MOLECULES.
  • USING ENZYMES TO BREAK DOWN THE FOOD MOLECULES. 

Slide 10 - Diapositive

Chemical digestion
Enzymes: Important chemicals

Slide 11 - Diapositive

Down the tube!
Oesophagus
Peristalsis: moving food down your oesaphagus (gullet)

Slide 12 - Diapositive

Work
Go to classroom and follow the link 'draw a model of the digestive system'.
  • Draw the organs of the digestive system
  • label the parts
  • add the functions

Slide 13 - Diapositive