HESI Introduction to Allied Health (AH) Practice Test

Pulmon- denotes the lungs, so it clearly points to the respiratory system, which covers breathing and gas exchange. You encounter this root in terms like pulmonary function tests or pulmonary arteries, both of which describe lung-related processes. The circulatory system is involved with the lungs through blood flow (pulmonary circulation), but the root itself is about the lungs, making the respiratory system the best fit. Endocrine and digestive use different roots, so they don’t align with pulmon-.