Τετράδιο Εργασιών, σελ. 106 - 109.

xenia-sti_taxi

When you run, when you swim, when you do intense exercise, you breathe faster than usual. Why is this happening?

Τετράδιο Εργασιών, σελ. 106 - 109.

xenia-sti_taxi

Place one palm on your chest and the other on your belly, while breathing normally. What do you notice?

My chest and belly move in and out when I breathe.

Τετράδιο Εργασιών, σελ. 106 - 109.

xenia-sti_taxi

Take a deep breath and blow up a balloon as much as you can. Close its mouth and compare it with the balloons that your classmates have blown up. Are all the balloons the same size?

Not all the balloons we inflated are the same size.

Τετράδιο Εργασιών, σελ. 106 - 109.

xenia-sti_taxi

• With the help of a classmate count how many times you breathe in one minute.
• Walk in place for a few minutes and count again. What do you notice?

At rest I breathe 35 - 40 times per minute.

After running I breathe 45 - 50 times a minute.

Τετράδιο Εργασιών, σελ. 106 - 109.

xenia-sti_taxi

In the image below you can see the organs of our respiratory system. Discuss with your teacher the function of each of them and write the names of the organs in the boxes. Draw arrows that show the path of air through our body when we breathe.

Τετράδιο Εργασιών, σελ. 106 - 109.

xenia-sti_taxi

Ρινική �κοιλότητα

Στοματική�κοιλότητα

Λάρυγγας

Τραχεία

Πνεύμονες

Βρόγχοι

κυψελίδα

nasal cavity

larynx

oral cavity

trachea

lungs

bronchi

alveolus

Τετράδιο Εργασιών, σελ. 106 - 109.

xenia-sti_taxi

The air we inhale has more oxygen and less carbon dioxide than the air we exhale. With breathing, oxygen passes into the blood and carbon dioxide is exhaled.

Τετράδιο Εργασιών, σελ. 106 - 109.

xenia-sti_taxi

When I get tired, my body needs more oxygen. That's why I have to breathe faster, to get more oxygen from the air I inhale.

Can you explain why you breathe faster when you swim, run, or do strenuous exercise?

Τετράδιο Εργασιών, σελ. 106 - 109.

xenia-sti_taxi

The left image shows the air we exhale, while the right image demonstrates the air we inhale, because air has more oxygen.

Which image corresponds to the air we inhale and which to the air we exhale?

Τετράδιο Εργασιών, σελ. 106 - 109.

xenia-sti_taxi

nasal cavity

trachea

alveolus

this is where gas exchange takes place

entry of the air we breathe

it is the continuation of the larynx and ends in the bronchi

Τέλος…