Which small airways supply air to lung tissue and are tiny branches from the bronchi?

Which small airways supply air to lung tissue and are tiny branches from the bronchi?

• A. Bronchioles
• B. Alveoli
• C. Bronchi
• D. Larynx

Answer: (A)

Understanding the airway tree helps: air travels from the trachea into progressively smaller passages, and the small airways that deliver air into lung tissue are the bronchioles. They branch from the bronchi and continue to subdivide until they reach the alveolar regions where gas exchange happens. Bronchioles lack cartilage and are surrounded by smooth muscle, which allows them to contract or relax to regulate airflow. Alveoli are tiny air sacs for gas exchange, not conduits for airflow. Bronchi are the larger airways that feed air into the bronchioles, and the larynx is the voice box at the top of the airway, not part of these small conducting branches.

Understanding the airway tree helps: air travels from the trachea into progressively smaller passages, and the small airways that deliver air into lung tissue are the bronchioles. They branch from the bronchi and continue to subdivide until they reach the alveolar regions where gas exchange happens. Bronchioles lack cartilage and are surrounded by smooth muscle, which allows them to contract or relax to regulate airflow. Alveoli are tiny air sacs for gas exchange, not conduits for airflow. Bronchi are the larger airways that feed air into the bronchioles, and the larynx is the voice box at the top of the airway, not part of these small conducting branches.