The organs that transport air from the trachea to the lungs are the bronchi. The trachea branches into two main bronchi (one for each lung), which then further divide into smaller bronchi and bronchioles inside the lungs. These airways form the tracheobronchial tree, a system of tubes that conduct air into the lungs where gas exchange occurs in the alveoli

. In summary:

• Air passes from the trachea into the left and right main bronchi.
• The bronchi branch into smaller bronchi inside the lungs.
• The bronchi further divide into bronchioles.
• Bronchioles end in alveoli, the tiny air sacs where oxygen and carbon dioxide are exchanged with the blood.

Thus, the bronchi are the key organs transporting air from the trachea to the lungs.