PATHOLOGY

Detailed explanation-1: -The surface area of both lungs is roughly the same size as a tennis court and the total length of the airways running through them is 1, 500 miles. That’s about the distance from Chicago to Las Vegas.

Detailed explanation-2: -The normal adult value is 1900-3300ml. It is the volume of air remaining in the lungs after maximal exhalation. Normal adult value is averaged at 1200ml(20‐25 ml/kg) .It is indirectly measured from summation of FRC and ERV and cannot be measured by spirometry.

Detailed explanation-3: -There is also a structural advantage to having the lungs be separate, the main one being that the bronchial tubes bifurcate naturally, and that there is a place for the heart and other “indivisible” organs in the middle. Separation also decreases the chance of problems or disease in one spreading to the other.