Which of the divisions of the pharynx functions as a passageway for food and air?
Select all that apply.
A Nasopharynx
B Oropharynx
C Laryngopharynx
The correct answer and explanation is:
The correct answers are:
B. Oropharynx
C. Laryngopharynx
Explanation:
The pharynx is divided into three regions: the nasopharynx, oropharynx, and laryngopharynx. Each of these regions has distinct roles, but when it comes to serving as a passageway for both food and air, two divisions play critical roles.
- Nasopharynx:
The nasopharynx primarily serves as a passage for air and is located behind the nasal cavity. It does not directly facilitate the movement of food. It connects the nasal cavity to the oropharynx and contains the adenoids (pharyngeal tonsils). The nasopharynx is responsible for the air passing into the throat but is not involved in the passage of food. - Oropharynx:
The oropharynx is located behind the oral cavity and functions as a passageway for both air and food. When food is swallowed, it moves through the oral cavity, down into the oropharynx, and then to the laryngopharynx. Similarly, air flows through the oropharynx when breathing. This region is where food and air paths converge before they are directed either to the esophagus or the larynx. - Laryngopharynx:
The laryngopharynx serves as the final segment of the pharynx before food and air are separated. It is situated below the oropharynx and directs food into the esophagus while directing air into the larynx. The laryngopharynx is crucial for ensuring that food and air follow the correct pathways: food into the esophagus for digestion, and air into the trachea for breathing.
In summary, both the oropharynx and the laryngopharynx are responsible for carrying food and air, while the nasopharynx mainly handles air.