Lung gas exchange Flashcards

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1
Q

Journey of air in

A

Air enters via trachea
Splits into bronchi passing into each lungs
Split further into bronchioles
At each end have alveoli
Diffuse through into blood

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2
Q

Rings of cartilage

A

Inside the trachea to prevent it collapsing whilst inhaling

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3
Q

Journey of air our

A

Carbon dioxide diffuses from blood into

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4
Q

Alveoli

A

Air sacks for the sites of gas exchange in lungs
Surrounded by capillaries where oxygen diffuses into deoxygenated blood and carbon dioxide into the alveoli

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5
Q

Alveoli Adaptations

A

Huge surface area due to many alveoli
Thin walls
Very good blood supply = oxygenated blood rapidly removed to keep a steep concentration gradient

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6
Q

Breathing

A

Increases rate of diffusion
By taking in fresh oxygen and removing co2
Keeping the concentration gradient high

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