The Lungs (AQA GCSE Biology): Flashcards
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Practise the cards
15 cards from this deck
Where are the lungs located?
Where are the lungs located?
In the thorax (upper body), protected by ribcage
Primary function of lungs
Primary function of lungs
Supply oxygen to blood and remove carbon dioxide
Another name for trachea
Another name for trachea
Windpipe
Function of intercostal muscles
Function of intercostal muscles
Ventilate the lungs by moving the ribcage during breathing
How many bronchi does the trachea divide into?
How many bronchi does the trachea divide into?
Two
Where does gas exchange occur in the lungs?
Where does gas exchange occur in the lungs?
In the alveoli (small air sacs)
Diaphragm movement during inhalation
Diaphragm movement during inhalation
Moves down
Ribcage movement during inhalation
Ribcage movement during inhalation
Moves up and out
Pressure in chest during inhalation
Pressure in chest during inhalation
Lower pressure
Ribcage movement during exhalation
Ribcage movement during exhalation
Moves down and in
How does oxygen move from alveoli to blood?
How does oxygen move from alveoli to blood?
Diffuses down its concentration gradient
How does carbon dioxide move from blood to alveoli?
How does carbon dioxide move from blood to alveoli?
Diffuses down its concentration gradient
Why do alveoli have a large surface area?
Why do alveoli have a large surface area?
To maximise diffusion
Benefit of thin alveoli walls
Benefit of thin alveoli walls
Creates short diffusion pathway, speeding up gas exchange
How to calculate breathing rate
How to calculate breathing rate
Number of breaths divided by number of minutes