The digestive system

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

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Slide 1: Slide
BiologieMiddelbare schoolhavoLeerjaar 2

This lesson contains 15 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 45 min

Items in this lesson

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

Slide 1 - Slide

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 - Slide

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 - Slide

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 - Slide

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 - Slide

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 - Slide

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 - Slide

Digestive juices

Slide 8 - Slide

Enzymes

Slide 9 - Slide

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

Slide 10 - Slide

Function of your teeth

Slide 11 - Mind map

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 - Quiz

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

Slide 13 - Open question

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 - Quiz

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

Slide 15 - Quiz