Review Activity and the Smell & taste senses (Please read and review)

Activity 1. Answer the questions below: 

1. What part of the eye can be blue, brown or green? 

I. __________________________________________________ 

2. Which part of the eye protects it? 

I. __________________________________________________ 

3. Which part of the is transparent? 

I. __________________________________________________ 

4. Which part of the sends information to the brain? 

I. __________________________________________________ 

Our Senses: Taste and Smell

We can detect flavour with our tongue. We can detect smell with our nose. The mouth and the nose are connected.

How we smell

Smell are made of gases in the air. When air goes into your nose, the gases go into your nasal passages. The olfactory cells detect the gases and send nerve impulses to the olfactory nerve. The olfactory nerve transmits the impulses to the brain and the brain interprets the information.  

Click to watch "Smell sense" video I

How we taste 

The tiny, pink bumps on your tongue are called taste buds. They can detect special chemicals in the things that you eat and drink. The chemicals mix with saliva and then the taste buds detect them. The taste buds produce nerve impulses and transmit them to the gustatory nerves. These nerves are inside the tongue, connected to the taste buds. These nerves then transmit the impulses to the brain. Finally, the brain interprets the information.

Click to watch "taste sense" video

How taste and smell are connected 

Have you ever noticed that food doesn´t taste good when you have a cold? This is because your senses of smell and taste work together. Your taste buds detect different tastes, such as sweet, salty, sour and bitter tastes. While your nose detects thousands of different smells. These messages combine in the brain to give a perception of flavor. 

Let´s think about the following questions:

- How do we detect smell and taste?

- Can you mention three important parts of the smell sense?

- How is the smell sent to the brain?

- What do the taste buds do?

- Are the taste and smell senses connected? Where do they mix the information?

Smell Sense video II