The digestive system

Welcome!
Today:
Nutrition game
Explanation about digestive system (page 97)
Making exercises

1 / 15
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Slide 1: Tekstslide
BiologieMiddelbare schoolhavoLeerjaar 2

In deze les zitten 15 slides, met interactieve quizzen en tekstslides.

time-iconLesduur is: 45 min

Onderdelen in deze les

Welcome!
Today:
Nutrition game
Explanation about digestive system (page 97)
Making exercises

Slide 1 - Tekstslide

What are we going to learn today?
Today we will be learning:
What the digestive system consist of.
What the function of your teeth are related to your digestion.
What perastaltic movements are. 
How your digestive juices break down food.

Slide 2 - Tekstslide

The digestive system
In your digestive system foods get, well, digested. This means:
- The good nutrients are taken in by your body. 
- The rest of the food gets removed from your body. 

Slide 3 - Tekstslide

Your teeth
The food you eat needs to go through your whole intestinal tract (about 15 meters!). So the food needs to get smooth, whole and wet. All that happens in your mouth. You chew it and your salivary glands add saliva. 

Slide 4 - Tekstslide

Your teeth
Besides that, by chewing your food you create more surface. This means more space for digestive juices to attach to and digest food more easily. This is a way of mechanical digestion

Slide 5 - Tekstslide

Perstaltic movement
Your food gets transported and kneaded by muscles that are in the walls of the digestive organs. That way your body makes sure the food goes the right way. This is done through peristaltic movements

Slide 6 - Tekstslide

Digestion
Your food gets digested mostly by digestive juices, which get made by digestive glands. Digestive juices are mostly water, with enzymes dissolved in it. Enzymes change the molecules of the nutrients by cutting them in pieces. That makes is easier to absorb it and use it. 

This is called chemical digestion

Slide 7 - Tekstslide

Digestive juices

Slide 8 - Tekstslide

Enzymes

Slide 9 - Tekstslide

Time to work!
The homework for next lesson are the exercises of paragraph 2.2, including the summary and plusexercises. 

Slide 10 - Tekstslide

Function of your teeth

Slide 11 - Woordweb

The enzyme lipase is dissolved in your saliva. What does this make saliva?
A
Digestive gland
B
Enzyme
C
Digestive juice
D
Digestive substance

Slide 12 - Quizvraag

People often say it's healthier to chew thoroughly on your food. Why is that? Name 2 reasons.

Slide 13 - Open vraag

Saliva is a digestive juice that mostly digests nutrients that are high in energy. Do they digest protein?
A
Sure
B
No way

Slide 14 - Quizvraag

Statement: In every digestive juice are the same enzymes because they all digest food.
A
True
B
False

Slide 15 - Quizvraag