The pressure within the lungs (in mmhg) at the end of inspiration leading to passive expiration is
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760 mm Hg
Since the lungs are passive (no muscle tissue), they expand due to the positive external pressure. e.g. if the environmental pressure is 760 mm Hg, the lung pressure is 757 mm Hg upon inspiration. Expiration results from the relaxation of the diaphragm and intercostal muscles.
Since the lungs are passive (no muscle tissue), they expand due to the positive external pressure. e.g. if the environmental pressure is 760 mm Hg, the lung pressure is 757 mm Hg upon inspiration. Expiration results from the relaxation of the diaphragm and intercostal muscles.
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When the pressure in the lungs decreases ,the greater atmospheric pressure out side the nose is higher. This leads to pushing of fresh air into the lungs by the inspiration process. When the air reaches the lungs it causes increase in pressure within it. This result to the pushing out again the carbon IV oxide from the lungs by expiration process and the process repeats itself.
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