HUMAN NUTRITION

Detailed explanation-1: -Both circular and longitudinal muscles occur in the walls of the pharynx; the circular muscles form constrictions that help push food to the esophagus and prevent air from being swallowed, while the longitudinal fibres lift the walls of the pharynx during swallowing.

Detailed explanation-2: -Pharynx Function It helps in the movement of food to the oesophagus. Circular muscles help in pushing the food down and longitudinal muscles help in swallowing the food by lifting and widening the walls.

Detailed explanation-3: -The exterior wall of the pharynx consists primarily of four muscles: superior pharyngeal constrictor, middle pharyngeal constrictor, inferior pharyngeal constrictor, and stylopharyngeus. The three pharyngeal constrictors muscles are quite simply arranged as they overlap each other in a vertical arrangement.