Pulmonologist MeliLan K. Han M.D. takes an in-depth look at the lungs, from how they function to the steps we can take to keep this vital organ healthy at all stages of life.

The lungs are one of our most important organs.

Located in the chest surrounding the heart cavity, the lungs begin to form in the human embryo around week three and reach peak function at around 25 years of age.

Because the lungs are incredibly vulnerable to air pollution and illness, even those who lead otherwise healthy lifestyles should take measures to protect their pulmonary health.

MeliLan K. Han, M.D., is a pulmonologist at the University of Michigan and a spokesperson for the American Lung Association.

In her 2022 book, Breathing Lessons, Han explains how the lungs work and why lung health contributes to our overall wellbeing.