Question

explain how smoking damages the respiratory system and name two conditions that can develop when a person smokes.

Explanation:

Smoking introduces harmful chemicals (like tar, nicotine, carcinogens) into the respiratory system. These chemicals irritate and inflame the airways, damage the cilia (tiny hair - like structures that help clear mucus and debris) in the respiratory tract, and can cause the alveoli (tiny air sacs in the lungs) to lose their elasticity.

For the conditions:

1. Chronic Obstructive Pulmonary Disease (COPD): It is a progressive disease that makes it hard to breathe. Smoking is the main cause as it damages the airways and alveoli over time, leading to conditions like emphysema (destruction of alveoli) and chronic bronchitis (long - term inflammation of the bronchial tubes with excessive mucus production).
2. Lung Cancer: The carcinogens in cigarette smoke can damage the DNA of lung cells, leading to uncontrolled cell growth and the formation of tumors.

Answer:

Smoking damages the respiratory system by introducing harmful chemicals (tar, nicotine, carcinogens) that irritate/inflate airways, damage cilia (reducing mucus - clearing ability), and harm alveoli (reducing elasticity). Two conditions: 1. Chronic Obstructive Pulmonary Disease (COPD) (includes emphysema, chronic bronchitis); 2. Lung Cancer.