MCQ IN MEDICINE

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: -The pharynx anatomy includes: Nasopharynx: The top part of the throat connects to the nasal cavities (nose) and lets air pass through. Oropharynx: The middle part of the throat connects to the oral cavity (mouth). It allows air, food and fluid to pass through.

Detailed explanation-3: -Anteriorly: the nasal cavity. Posteriorly: posterior pharyngeal wall. Inferiorly: the soft palate.

Detailed explanation-4: -The walls of nasopharynx, oropharynx, and laryngopharynx are composed of four layers. From internal (luminal side) to external, the layers are the mucosa, submucosa, muscle layer, and fibrosa.