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: -Bronchioles divide into even smaller bronchioles, called terminal, which are 0.5 mm or less in diameter. Terminal bronchioles in turn divide into smaller respiratory bronchioles which divide into alveolar ducts.

Detailed explanation-3: -Your bronchioles are some of the smallest airways in your lungs. Inhaled air passes through tiny ducts from the bronchioles into elastic air sacs (alveoli).

Detailed explanation-4: -The bronchial tubes, which branch into smaller tubes called bronchioles, are sometimes referred to as bronchi or airways.

Detailed explanation-5: -Bronchioles are instead anchored to the tissues that they carry air to. Bronchioles are also supported by smooth muscle tissue, which surrounds each bronchiole. This smooth muscle tissue is sometimes prone to contract, reducing the size of the bronchioles.