THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The terminal bronchioles divide further to form several generations of respiratory bronchioles, which are the narrowest airways in the lungs that give rise to alveolar ducts and alveolar sacs (respiratory bronchioles and alveoli form the respiratory zone).

Detailed explanation-2: -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. The bronchioles, which are the smallest segments of your bronchi.

Detailed explanation-3: -Terminal bronchioles in turn divide into smaller respiratory bronchioles which divide into alveolar ducts. Terminal bronchioles mark the end of the conducting division of air flow in the respiratory system while respiratory bronchioles are the beginning of the respiratory division where gas exchange takes place.