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Final answer:
Intrapulmonary pressure is always greater than intrapleural pressure. Inspiration decreases intra-pulmonary pressure, allowing air to enter the lungs, while expiration increases this pressure, causing air to leave the lungs.
Explanation:
Intrapulmonary pressure is always greater than intrapleural pressure. During inspiration, the diaphragm contracts, increasing thoracic volume and decreasing intra-pulmonary pressure, allowing air to enter the lungs. Expiration is a passive process where the diaphragm and intercostal muscles relax, leading to a decrease in thoracic volume and an increase in intra-pulmonary pressure, causing air to leave the lungs.
Learn more about Respiration here:
https://brainly.com/question/33781522
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