THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -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.

Detailed explanation-2: -Pharynx consists of three parts I.e. nasopharynx, laryngopharynx, and oropharynx. Nasopharynx is a continuity of nasal cavity and it helps in conditioning of the inspired air. Oropharynx helps in both voluntary or involuntary action of swallowing. Laryngopharynx helps in speech and formation of voice.

Detailed explanation-3: -There are three main divisions of the pharynx: the oral pharynx, the nasal pharynx, and the laryngeal pharynx. The latter two are airways, whereas the oral pharynx is shared by both the respiratory and digestive tracts.