digestive system

• Engels
• MBO
• Studiejaar 2

Today's lesson you will learn

how the digestive system works

new vocabulary

how organs work

content of this lesson

watch a video clip and answer questions

What do you know about the digestive system?

organs

00:28

The digestive system contains ........ organs

1. 12
2. 9
3. 10
4. 7

01:17

which 3 organs break down food?

1. gallbladder, liver, spleen
2. pancreas, liver, gallbladder
3. liver, gallbladder, tongue
4. none of the above

01:42

Digestion begins in your

1. mouth
2. stomach
3. liver
4. brain

02:23

Food is pushed into your stomach by

1. muscular contractions called peristalsis
2. digestive juices
3. voluntary control
4. gravity

02:53

What does bile do?

1. it secretes nutrients
2. it breaks down proteins
3. it produces digestive juices
4. it digests fat

03:31

The role of the pancreas, liver, and gallbladder is to

1. use enzymes and bile to break down food
2. clear the system of any toxins
3. break food into small chunks
4. remove liquid from the stomach

04:36

how long does digestion take from the first bite to secretion?

1. 20 - 24 hours
2. 8 - 10 hours
3. 30 - 40 hours
4. 60 - 65 hours

The digestive system

Chemical Digestion

• Breaking food into even smaller molecules
• How? 
• Use digestive juices made in the digestive glands
• Digestive juices contain enzymes.

Chemical digestion

Enzymes: Important chemicals

Digestive system

-Digestive organs receive oxygen.

-Digestive organs release nutrients (but no oxygen).

-Veins carry nutrients to liver.

-Liver checks 

 harmful substances + stores nutrients.

Do it yourself

read 2.3

underline or highlight difficult words and look them up

do the excerises