1. Food and Digestion Title: Taste Testing Sept Prior learning
Foods are made of different components
Key words
Bitter, sweet, sour, salt, taste buds

2. Food and Digestion By the end of this lesson we should be able to:
Describe long-term changes that have occurred in our universe to our solar system and earth
By the end of this lesson we should be able to:
Success Criteria:
Know why we need food (level 3)
Know what happens to food in the mouth (level 4)
Explain how nutrients are broken down in the mouth (level 5)
I have drawn a diagram of the tongue showing where we taste food
I have described what happens in the mouth as the first stage of digestion
I have explained how the teeth and tongue work together with saliva to break food down

3. Food and Digestion
Starter
Draw the tongue into your exercise books

4. Food and Digestion
The tongue has tiny bumps on it which contain tiny sense organs called taste buds.
Taste buds are sensitive to chemicals in food.
These chemicals need to dissolve in the saliva before you can taste them. This is why dry food has no taste until you start to chew it and mix it with saliva!

5. Food and Digestion Your sense of taste is useful.
It stimulates your stomach to produce digestive juices for digestion.
Many poisons and bad foods have a nasty taste. So you can spit them out before they harm you.
There are 4 different taste buds; Sweet, Salt, Sour and Bitter in different regions of the tongue. A food can stimulate more than one of them at any one time.
diagram 1

6. Food and Digestion Take a cotton bud and place it in a food taster.
Place a small amount of this in each of the four regions of the tongue.
Repeat step 2 using a clean tip for each of the tasters.
Now that you know where each are tasted, try to figure out what the mystery taster is????
Record your results by labelling your tongue diagram.
diagram 1

7. Plenary - Think Food and digestion
If there are only 4 different taste buds then how do we ‘taste’ the hundreds of different ‘flavours’ of food and drink that are produced??????

8. Food and Digestion By the end of this lesson we should be able to:
Describe long-term changes that have occurred in our universe to our solar system and earth
By the end of this lesson we should be able to:
Success Criteria:
Know why we need food (level 3)
Know what happens to food in the mouth (level 4)
Explain how nutrients are broken down in the mouth (level 5)
I have drawn a diagram of the tongue showing where we taste food
I have described what happens in the mouth as the first stage of digestion
I have explained how the teeth and tongue work together with saliva to break food down