Assertion :The lungs are situated in thoracic chamber which is anatomically an air-tight chamber. Reason: Such an arrangement is essential to avoid any change in pulmonary volume.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
The lungs are situated in the thoracic chamber which is anatomically an air-tight chamber. The anatomical setup of lungs in thorax is such that any change in the volume of the thoracic cavity will be reflected in the lung (pulmonary) cavity. Such an arrangement Is essentia! for breathing, as we cannot directly alter the pulmonary volume.

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