What human body part is primarily affected by asthma?

Asthma primarily affects the lungs, which are vital components of the respiratory system. It is a chronic condition characterized by inflammation and narrowing of the airways, leading to difficulty in breathing, wheezing, chest tightness, and coughing.

The condition is triggered by various factors, including allergens, exercise, cold air, and pollution, causing the muscles around the airways to tighten and the lining of the airways to become inflamed. This results in reduced airflow and difficulty breathing, especially during exacerbations or attacks. Given this definition, it's clear that the lungs are at the center of asthma's impact, making this the correct choice.

Understanding the role of the lungs in asthma can help individuals manage their symptoms and seek appropriate treatment.