Answer: When you breathe in, or inhale, your diaphragm contracts and moves downward. This increases the space in your chest cavity, and your lungs expand into it. The muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale.
Explanation:
Answer:
During inhalation, the diaphragm contracts and moves downward, increasing the space in the chest cavity. Air is sucked in through the nose and mouth and eventually travels to the lungs, which expand.
During exhalation, the diaphragm relaxes and moves upward, reducing the space in the chest cavity. This forces carbon dioxide out of the lungs through the nose and mouth.
Explanation:
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