Asbestos health problems are caused primarily by inhalation of asbestos fibers into which part of the lungs?

Asbestos health problems are caused primarily by inhalation of asbestos fibers into which part of the lungs?

• A. Lower lung area
• B. Upper airways
• C. Alveolar sacs
• D. Pleural space

Answer: (A)

When asbestos fibers are inhaled, they tend to settle in the deeper parts of the lungs, with a preference for the lower regions. Gravity and the way air flows through the airways cause respirable fibers to deposit in the distal, subpleural areas of the lower lobes. The body's response to these deposited fibers is chronic inflammation and fibrosis, which is the hallmark of asbestosis. That’s why asbestos-related health problems are most closely linked to the lower lung area. While pleural disease can also occur, the characteristic parenchymal changes and fibrosis start in the lower zones of the lungs rather than the upper airways or the alveolar sacs specifically.

When asbestos fibers are inhaled, they tend to settle in the deeper parts of the lungs, with a preference for the lower regions. Gravity and the way air flows through the airways cause respirable fibers to deposit in the distal, subpleural areas of the lower lobes. The body's response to these deposited fibers is chronic inflammation and fibrosis, which is the hallmark of asbestosis. That’s why asbestos-related health problems are most closely linked to the lower lung area. While pleural disease can also occur, the characteristic parenchymal changes and fibrosis start in the lower zones of the lungs rather than the upper airways or the alveolar sacs specifically.