ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Bronchial tree, computer artwork. The human bronchial tree is the network of airways serving both lungs. Shown here is only the left bronchi. Further divisions of the bronchi then takes place, with the smallest branches, the bronchioles, terminating in alveoli (air sacs), where gaseous exchange with the blood circulation takes place.
Model release not required. Property release not required.