Which structures help move air from the trachea into the lungs?

• A. Bronchi
• B. Pleura
• C. Alveoli
• D. Diaphragm

Answer: (A)

Verified step by step guidance

1. Begin by understanding the anatomy of the respiratory system. The trachea, also known as the windpipe, is a tube that connects the larynx to the bronchi.
2. Identify the role of the bronchi. The trachea divides into two main bronchi (left and right), which are the primary passageways that direct air into each lung.
3. Consider the function of the pleura. The pleura are membranes that envelop the lungs and line the chest cavity, providing lubrication and facilitating lung movement during breathing, but they do not directly move air.
4. Examine the role of alveoli. Alveoli are tiny air sacs at the end of the bronchioles where gas exchange occurs, but they do not transport air from the trachea.
5. Understand the function of the diaphragm. The diaphragm is a muscle that plays a crucial role in breathing by contracting and relaxing to change the pressure in the thoracic cavity, aiding in air movement, but it does not directly move air from the trachea to the lungs.