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Chapter 22 Respiratory System Part1

The speaker is discussing the mechanics of breathing and the changes in pressure within the thoracic cavity during inhalation and exhalation. They explain that during inhalation, the volume of the thoracic cavity increases, which decreases the pressure inside the lungs, causing air to flow in. On the other hand, during exhalation, the pressure inside the lungs increases, which causes air to flow out. The speaker also discusses the role of the thoracic wall in expanding and contracting during breathing, which affects the pressure within the pleural cavity.Some possible questions that could be asked based on this content are:1. How does the size of the thoracic cavity change during breathing?2. What is the role of the diaphragm in breathing?3. How does the pressure within the lungs change during inhalation and exhalation?4. What is the function of the pleural membranes in the breathing process?5. How does the contraction and relaxation of the thoracic wall affect the pressure within the pleural cavity?
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