Alveoli directly branch off of all airways distal to the terminal bronchiole. Air flows into the atrium of the alveolar sac, then circulates into alveoli where gas exchange occurs with the capillaries. Each alveolar sac contains 20 to 30 spherical alveoli and has the appearance of a bunch of grapes. The main difference between bronchi and bronchioles is that bronchi are involved in the conducting, ... Gas Exchange, Lobular Bronchioles, Primary Bronchi, Respiratory Bronchioles, Secondary Bronchi, Terminal Bronchioles, Tertiary Bronchi. Terminal bronchioles are connected by respiratory bronchioles to alveolar ducts and alveolar sacs. Each alveolar sac contains 20 to 30 spherical alveoli and has the appearance of a bunch of grapes. bronchus (plural: bronchi) smaller branch of cartilaginous tissue that stems off of the trachea; air is funneled through the bronchi to the region where gas exchange occurs in alveoli. Air flows into the atrium of the alveolar sac, then circulates into alveoli where gas exchange occurs with the capillaries. (plural: alveoli) (also, air sac) terminal region of the lung where gas exchange occurs. The bronchi, bronchioles, and terminal bronchioles are a series of branching airways that represent the conducting system for air to travel from the trachea to the alveolar ducts and alveoli where gas exchange occurs. Oxygen is inhaled and absorbed into the bloodstream through the thin walls of each alveolus, by way of the pulmonary veins. Terminal bronchioles are connected by respiratory bronchioles to alveolar ducts and alveolar sacs. bronchiole. Terminal bronchioles, which include the conducting airways, further subdivide into two or more respiratory bronchioles in which gas exchange begins.

Terminal bronchioles branch into respiratory bronchioles , These are the narrowest of the airways and are in turn divided into alveolar ducts. Bronchi refer to the tubules that form the main passageway of air into the lungs. Each alveolar sac contains 20 to 30 spherical alveoli and has the appearance of a bunch of grapes.

As a result, all such airways are termed “respiratory airways” because they can participate in gas exchange. Each terminal bronchiole separates to create respiratory bronchioles that have alveoli, which are small, balloon-like sacs at the end of the small air passages in the lungs (the bronchiole). airway that extends from the main tertiary bronchi to the alveolar sac Figure \(\PageIndex{9}\): Terminal bronchioles are connected by respiratory bronchioles to alveolar ducts and alveolar sacs. The bronchioles different units of the lungs, or pulmonary lobules.The bronchioles continue dividing into smaller terminal bronchioles, which divide into the smallest respiratory bronchioles.At the respiratory bronchioles, alveoli begin surround the bronchioles and the walls become thin enough that gas exchange can take place.

The respiratory bronchioles divide into two or more alveolar ducts, which in turn supply several alveoli. Air flows into the atrium of the alveolar sac, then circulates into alveoli where gas exchange occurs with the capillaries.

What are Bronchi.

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