What three respiratory diseases combine in chronic obstructive pulmonary disease? how does smoking cause this disease?

Question: What three respiratory diseases combine in chronic obstructive pulmonary disease? how does smoking cause this disease?

Chronic Obstructive Pulmonary Disease (COPD) is a term that encompasses several progressive lung diseases, including emphysema, chronic bronchitis, and non-reversible asthma. These conditions contribute to the obstruction of airflow in and out of the lungs, leading to difficulty breathing. Smoking is a primary cause of COPD, as it leads to inflammation and damage to the lung tissue. The smoke from cigarettes contains a multitude of chemicals that can weaken the lungs' defense against infections, narrow air passages, and destroy the air sacs, which are crucial for oxygen exchange. Over time, the ongoing damage from smoking can cause the airways to become inflamed and thickened, further restricting airflow and exacerbating the symptoms of COPD. It's important to note that while smoking is a significant risk factor, other factors like air pollution and occupational hazards can also contribute to the development of COPD.

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