Question

what is the first place air enters into the respiratory system? lungs alveoli trachea primary bronchi

Explanation:

Air first enters the respiratory system through the nose or mouth and then passes through the pharynx and larynx before reaching the trachea. Lungs are the main organs for gas - exchange, alveoli are the sites of gas - exchange within the lungs, and primary bronchi are branches of the trachea.

Answer:

Trachea