Label the structures of the upper respiratory tract (sagittal view) by clicking and dragging the labels to the correct location. Naris (nostril) Vocal fold (true vocal cord) Oropharynx Sphenoidal sinus Epiglottis Nasal meatuses Nasal conchae Frontal sinus Vestibular fold Nasopharynx Laryngopharynx
The Correct Answer and Explanation is:
In the sagittal view of the upper respiratory tract, the correct placement of labels is as follows:
- Naris (nostril) – Positioned at the external opening of the nose.
- Frontal sinus – Located within the frontal bone, superior to the nasal cavity.
- Sphenoidal sinus – Found within the sphenoid bone, posterior to the nasal cavity.
- Nasal conchae – Curved bony structures within the nasal cavity that enhance airflow.
- Nasal meatuses – Air passages situated beneath the nasal conchae.
- Nasopharynx – The upper part of the pharynx, posterior to the nasal cavity.
- Oropharynx – The middle segment of the pharynx, posterior to the oral cavity.
- Laryngopharynx – The lowest section of the pharynx, connecting to the larynx.
- Epiglottis – A flap of cartilage that prevents food from entering the trachea.
- Vestibular fold – A mucosal fold situated above the vocal cords.
- Vocal fold (true vocal cord) – A structure within the larynx responsible for sound production.
The upper respiratory tract is critical for breathing, filtration, and phonation. Air enters through the nostrils and flows through the nasal cavity, where nasal conchae and meatuses condition and humidify it. The frontal and sphenoidal sinuses contribute to mucus production and voice resonance. The air then travels through the nasopharynx, past the oropharynx, and into the laryngopharynx before reaching the trachea.
The epiglottis acts as a protective mechanism, directing food away from the airway during swallowing. The vestibular folds provide structural support, while the vocal cords vibrate to produce sound. Each component of the upper respiratory tract works seamlessly to ensure efficient airflow, speech, and protection against foreign particles. Understanding this anatomy is essential for diagnosing respiratory conditions and surgical interventions.
