MICROANATOMY

Detailed explanation-1: -The trachea branches into two smaller airways: the left and right mainstem [or main] bronchi. Each lung is divided into sections (lobes): three in the right lung and two in the left lung.

Detailed explanation-2: -Further down, the trachea divides into two tubes (left and right) called bronchi (BRAHN-kye). The bronchi connect the trachea to the lungs.

Detailed explanation-3: -In the mediastinum, at the level of the fifth thoracic vertebra, the trachea divides into the right and left primary bronchi.

Detailed explanation-4: -In your lungs, the main airways, called bronchi, branch off into smaller and smaller passageways. The smallest airways, called bronchioles, lead to tiny air sacs called alveoli.