ANATOMY

Detailed explanation-1: -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.

Detailed explanation-2: -Tiny air sacs at the end of the bronchioles (tiny branches of air tubes in the lungs).

Detailed explanation-3: -Then your bronchi divide into branches that get smaller and smaller starting with: The lobar bronchi, which pass into a section (lobe) of your lungs. The segmental bronchi, which pass through a segment of each lobe.

Detailed explanation-4: -The trachea branches to give rise to two primary (main) bronchii. These then branch successively to give rise in turn to secondary and tertiary bronchii. These then branch to give rise to several orders of progressively smaller airways called bronchioles, the smallest of which are called terminal bronchioles.

Detailed explanation-5: -(BRONG-kee-ole) A tiny branch of air tubes in the lungs. Enlarge.