Breathe in... and out paragraph 3: Like a pair of bellows

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Breathe in... and out

Paragraph 3: Like a pair of bellows

Ways of breathing

Thoracic inhalation:

1. Intercostal muscles contract
2. Ribs move upward and forward
3. Chest becomes bigger
4. Lungs become bigger
   
5. air is sucked into the lungs

Thoracic exhalation:

1. Intercostal muscles relax
2. Ribs move downward and backward
3. Chest becomes smaller
4. Lungs become smaller
   
5. Air is pushed out of the lungs

Abdominal inhalation:

1. Abdominal muscles contract
2. The diaphragm contracts and moves down
3. Chest becomes bigger
4. Lungs become bigger
   
5. Air is sucked into the lungs

Abdominal exhalation:

1. Abdominal muscles relax
2. The diaphragm moves up
3. Chest becomes smaller
4. Lungs become smaller
   
5. Air is pushed out of the lungs

THORACIC INHALATION

THORACIC EXHALATION

ABDOMINAL INHALATION

ABDOMINAL EXHALATION

intercostal muscles contract

intercostal muscles relax

diaphragm relaxes

diaphragm contracts

chest becomes smaller

the diaphragm moves up

chest becomes bigger

This way of breathing is:... ?

Diaphragmatic breathing is used during / in...

1. your sleep and while resting
2. action
3. both
4. neither

Recap: diaphragmatic breathing

This way of breathing is:...

Chest breathing is used during / in

1. your sleep and while resting
2. action
3. both
4. neither

Combined breathing

spirometer

measures long volume, but which one?

tidal volume: volume of air you breathe in or out

vital capacity: when you exhale as much as you can

residual volume: what's left after you exhale as much as you can

lung volume: vital + residual volume