1.4 Breathing

U1: combustion and respiration
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U1: combustion and respiration

Slide 1 - Diapositive

Planning for today

  • Planning till test (2 min)
  • Lookback last class (10 min)
  • 1.4: Breathing (10 min)
  • Exercises (20 min)



Slide 2 - Diapositive

at the end of class
... you can describe how inhalation and exhalation are achieved.
 



Slide 3 - Diapositive

planning till test
29/09
1.4 breathing
30/09
1.8 cold and warmblooded
06/10
Prepare for test
07/10
Test

Slide 4 - Diapositive

Slide 5 - Diapositive










Complete sentences. Choose between: a lot of – only a little.

  • The air at arrow 1 contains ...  oxygen and ...  carbon dioxide.
  • The air at arrow 2 contains ...  oxygen and ... carbon dioxide.
  • The blood at arrow 3 contains ,,,  oxygen and ...  carbon dioxide.
  • The blood at arrow 4 contains  ... oxygen and  ...carbon dioxide.










Explain how you can tell from the diagram which interval (P or Q) had more combustion taking place in Alex’s body.

Slide 6 - Diapositive

You breathe using the respiratory muscles.

Slide 7 - Diapositive

chest breathing
In chest breathing (thoracic breathing), the ribs and the breastbone move.

Breath in:
Intercostal muscles tense --> moves your ribs and breastbone up,

Breath out:
Intercostal muscles relax --> moves your ribs and breastbone down.

Slide 8 - Diapositive

Slide 9 - Diapositive

abdominal breathing
In abdominal breathing (diaphragmatic breathing), the diaphragm and abdominal wall move.

Breath in:
The diaphragm contracts, making it move downwards

Breath out:
The diaphragm relaxes, making it move back upwards to normal position.

Slide 10 - Diapositive

Slide 11 - Diapositive

Homework
Read 1.4: chest and abdominal breathing
make ex. 2,3,8,9

done? 

Make test yourself 1.4

Slide 12 - Diapositive