What structure of the respiratory system conducts air into the right and left primary bronchi? A. Pharynx B. Larynx C. Nasal cavity D. Trachea

Breakdown the Problem

To identify which structure of the respiratory system conducts air into the right and left primary bronchi, we need to review the anatomy of the respiratory system and the pathway of air.

Relevant Concepts

The respiratory system has specific structures that facilitate the movement of air from the external environment to the lungs. The key structures are:

• Nasal Cavity: Warms, moistens, and filters air.
• Pharynx: Connects the nasal cavity to the larynx and esophagus.
• Larynx: Contains the vocal cords and acts as a passageway for air.
• Trachea: The windpipe that connects the larynx to the bronchi.

Analysis and Detail

1. Nasal Cavity: This structure initiates the respiratory process but does not conduct air directly into the bronchi.
2. Pharynx: Acts as a pathway for both air and food, but it does not lead directly to the bronchi.
3. Larynx: While it leads to the trachea, it is not the specific structure that conducts air to the bronchi.
4. Trachea: This is a key structure that connects the larynx to the right and left primary bronchi. It serves as the main airway leading directly to the bronchi.

Verify and Summarize

After analyzing the roles of each structure, it becomes clear that the trachea is the airway that conducts air directly into the right and left primary bronchi. The nasal cavity, pharynx, and larynx serve earlier functions in the pathway of air.

Final Answer

D. Trachea