Question

figure: image of the two parts of the respiratory system
which of these anatomical structures is part of the lower respiratory system?
pharynx
sinuses
bronchioles

Explanation:

The upper respiratory system includes structures like the nose, nasal cavity, sinuses, pharynx, and larynx. The lower respiratory system consists of the trachea, bronchi, bronchioles, alveoli, and lungs. Pharynx is part of the upper respiratory system. Sinuses are also part of the upper respiratory system. Bronchioles are part of the lower respiratory system as they are part of the branching network within the lungs that leads to the alveoli.

Answer:

bronchioles