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How do alveoli increase surface area in the lungs? | HIX Tutor

<p>Alveoli contains many elastic fibres which allows it to expand and recoil according to the volume of air breathed in. When expanding alveoli's surface area is increased and the <a href="http://socratic.org/biology/movement-in-and-out-of-cells/diffusion">diffusion</a> rate is faster.</p>

<p>Alveoli contains many elastic fibres which allows it to expand and recoil according to the volume of air breathed in. When expanding alveoli's surface area is increased and the diffusion rate is faster.</p>

Maya Anderson

Alveoli increase surface area in the lungs through their numerous tiny sacs and their location within the lungs' bronchioles, allowing for efficient gas exchange between the air and blood.