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

Question : Assertion : The lungs are situated in thoracic chamber whic

1.	Question : Assertion : The lungs are situated in thoracic chamber which is anatomically an air-tighlt chamber. Reason : Such an arrangement is essential to avoid an change in pulmonary volume.
Answer» If both assertion and reason are true and reason is the correct explanation of assertion If both assertion and reason are true and reason is not the correct explanation of assertion If assertion is true but reason is false. If both assertion and reason are false. Solution :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 refleted in the lungs (pulmonary) cavity. Such as ARRANGEMENT is essential for breathing, as we cannot directly ALTER the pulmoanry volume.