1. The physical mechanism of breathing (how do we pull air in and push air out). Hint: think muscles, volume, and pressure. 2. Explain the purpose of breathing (think about what is entering and leaving the bloodstream) 3. Cardiovascular system review: Describe how the circulatory system interacts with the respiratory system (think about gas exchange both in the lungs and throughout the body).
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The physical mechanism of breathing involves the diaphragm and intercostal muscles. When we inhale, the diaphragm contracts and moves downward, while the intercostal muscles contract and lift the rib cage up and out. This increases the volume of the thoracic Show more…
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