Final answer:
d) Oropharynx
The tip of a Mac blade is placed in the oropharynx, which is a passageway for both air and food.
Step-by-step explanation:
The tip of a Mac blade is placed in the oropharynx.
The oropharynx is a passageway for both air and food, bordered superiorly by the nasopharynx and anteriorly by the oral cavity. As the nasopharynx becomes the oropharynx, the epithelium changes from pseudostratified ciliated columnar epithelium to stratified squamous epithelium.
The oropharynx contains two distinct sets of tonsils, the palatine and lingual tonsils, which trap and destroy pathogens entering the body through the oral or nasal cavities.