Occupational Safety and Health Administration. 1  Department of Labor, Labor Department, DoL, Labor - the federal department responsible for promoting the working conditions of wage earners in the United States; created in 1913.
The oxygen and carbon dioxide exchange take place in the alveoli. Primary bronchi are located on the upper portion of the lungs, secondary bronchi is located at the center of the lungs and tertiary bronchi is located near bottom of the organs above the bronchioles.
Bronchi is plural. The primary right and left bronchi direct the air into the right and left lungs. It then splits to go to each l â¦ obe of the lung. These tubes are secondary or lobar bronchi.The next division is the bronchiole tree, the alveolar duct and the alveolar sacs or clusters.ronchi is plural. The primary right and left bronchi direct the air into the right and left lungs. It then splits to go to each l â¦ obe of the lung. These tubes are secondary or lobar bronchi.