different food

Слайд 2

We eat different food every day. Food can be sweet, salty,

We eat different food every
day.
Food can be sweet, salty, sour and

bitter.
How do we distinguish the
taste of food?
Слайд 3

The are thousands nerve sensors on our tongue. Some of them

The are thousands nerve sensors on our tongue.
Some of them react

to sweet food, others to salty food.
When we eat these sensors send information to our brain.
And so we learn what the taste of food we eat is.
But the tongue must be wet!
Слайд 4

Experiment№1 Dry your tongue with a napkin. Then put some sugar

Experiment№1

Dry your tongue with a napkin.
Then put some sugar on

your tongue.You will
feel no taste.
The conclusion: Our tongue should be wet to feel the taste of food.
When we are healthy our tongue is wet, so we can feel (recognize) the taste of food.
Слайд 5

Experiment№2 Put a little salt on the back part of the

Experiment№2

Put a little salt on the back part of the

tongue.You will feel nothing.
Put a little salt on the front part of the tongue. Salt is very salty,is not it?
There are different nerve sensors on your tongue.