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How Emphysema occur?...

How Emphysema occur?

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Emphysema is chronic breathlessness causedby gradual breakdown of the thin walls of thealveoli decreasing the total surface area of agaseous exchange. i.e., widening of the alveoliis called emphysema.
2. The major cause for this disease is cigarette smoking, which reduces the respiratory surface of the alveolar walls.
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