While breathing in,your chest size will …
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Meghna Thapar 5 years, 7 months ago
The size of the chest cavity increases during inhalation.
When you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand. The intercostal muscles between your ribs also help enlarge the chest cavity.
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