From Wikipedia
Jump to: navigation, anapen
The lungs flank the heart and great vessels in the chest cavity.[1]
Air enters and leaves the lungs via a conduit of cartilaginous passageways — the bronchi and bronchioles. In this image, lung tissue has been dissected away to reveal the bronchioles[1]
  1. 1.0 1.1 Gray's Anatomy of the Human Body, 20th ed. 1918.