Which regions make up the pharynx?

The pharynx is an anatomical structure that acts as a passageway for both air and food and is divided into three distinct regions: the nasopharynx, oropharynx, and laryngopharynx. The nasopharynx is located behind the nasal cavity and is primarily involved in respiration. The oropharynx is situated behind the oral cavity and serves as a conduit for both air and food. Lastly, the laryngopharynx is the lowest part, leading into the larynx for air and the esophagus for food. Together, these three regions collectively facilitate important functions such as respiration and digestion, making this option the comprehensive and accurate description of the pharynx's anatomy.