ANATOMY

Detailed explanation-1: -o Nasopharynx-located behind the nasal cavity, it connects the nasal cavity to the oropharynx. laryngopharynx and serves as a passageway for both food and air.

Detailed explanation-2: -Air, food and liquid all pass through this common passage, the oropharynx. The two passages separate again here, in the hypopharynx. Food and liquid pass backward into the esophagus on their way to the stomach. Air passes forward through the larynx and into the trachea, on its way to the lungs.

Detailed explanation-3: -The esophagus is a soft, muscular tube that moves food from the pharynx to the stomach.

Detailed explanation-4: -The esophagus is a collapsible muscular tube that serves as a passageway between the pharynx and stomach. As it descends, it is posterior to the trachea and anterior to the vertebral column. It passes through an opening in the diaphragm, called the esophageal hiatus, and then empties into the stomach.

Detailed explanation-5: -Regionally, the pharynx divides into three parts which are from superior to inferior:-the nasal pharynx, located behind the posterior nasal apertures (choanae), the oral pharynx, located behind the opening of the oral cavity, and the laryngeal pharynx, located behind the inlet (opening) of the larynx.