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10 cards from this deck
In thorax (upper body), protected by ribcage
Ventilate lungs by moving ribcage during breathing
Two bronchi
Small air sacs where gas exchange occurs
Moves down, increases volume of thoracic cavity
Ribcage up and out, diaphragm down
Ribcage down and in, diaphragm up
Diffuses down its concentration gradient
Creates short diffusion pathway, speeds gas exchange
Breaths taken ÷\div÷ minutes = breaths per minute
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