Which of these structures is part of the lower respiratory system?Multiple choice question.nosesinuspharynxtrachea

Break Down the Problem

1. Identify the structures mentioned in the options: nose, sinus, pharynx, trachea.
2. Define the lower and upper respiratory systems.

Relevant Concepts

1. Upper Respiratory System: Comprises the nose, nasal cavity, sinuses, and pharynx.
2. Lower Respiratory System: Includes the trachea, bronchi, bronchioles, and lungs.

Analysis and Detail

1. Nose: A part of the upper respiratory system responsible for airflow and filtration.
2. Sinus: An air-filled cavity that is part of the upper respiratory system, specifically connecting to the nasal cavity.
3. Pharynx: Also part of the upper respiratory system, acting as a passageway for air and food.
4. Trachea: The windpipe that connects the larynx to the bronchi, part of the lower respiratory system.

Verify and Summarize

Based on the definitions:

• The trachea is the only structure listed that is part of the lower respiratory system.

Final Answer

Trachea is part of the lower respiratory system.