The first passages of the respiratory zone, which have alveoli in their walls, are called: (a) Terminal bronchioles (b) Respiratory bronchioles (c) Alveolar ducts (d) Alveolar sacs. | Homework.Study.com
Alveolar Ducts: Function & Definition | Study.com
Alveoli - Physiopedia
Emphysema | medical disorder | Britannica
Bronchioles and alveoli in the lungs - Mayo Clinic
Respiratory Methodology
Alveolar sac diagram Diagram | Quizlet
2.2 – Respiratory Structures and Their Function – Introductory Animal Physiology 2nd Edition
Anatomy and Physiology Respiratory System Flashcards | Quizlet
Definition of alveoli - NCI Dictionary of Cancer Terms - NCI
Respiratory System Flashcards | Quizlet
Alveolar sac hi-res stock photography and images - Alamy