![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 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](https://homework.study.com/cimages/multimages/16/alveoli9198808891371469837.jpg)
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
![structures of respiratory zone, alveoli, alveolar duct, alceolar sac, alveolar duct, respiratory bronchioles, termin… | Respiratory system, Respiratory, Pulmonology structures of respiratory zone, alveoli, alveolar duct, alceolar sac, alveolar duct, respiratory bronchioles, termin… | Respiratory system, Respiratory, Pulmonology](https://i.pinimg.com/736x/9f/4b/a1/9f4ba11df2a4806ec51c51b0edf65744--terminal-respiratory-system.jpg)
structures of respiratory zone, alveoli, alveolar duct, alceolar sac, alveolar duct, respiratory bronchioles, termin… | Respiratory system, Respiratory, Pulmonology
![www.therespiratorysystem.com alveoli | Human anatomy and physiology, Respiratory therapy notes, Vet medicine www.therespiratorysystem.com alveoli | Human anatomy and physiology, Respiratory therapy notes, Vet medicine](https://i.pinimg.com/736x/fb/a1/cd/fba1cd583314c959c0caef21a17e1908.jpg)