Pharyngeal Constrictor Muscles

Question 1

Arterial Supply

Answer 1

Ascending pharyngeal artery from external carotid artery

Question 2

Nerve innervation

Answer 2

Pharyngeal branch of vagus

Question 3

Function

Answer 3

As soon as the bolus of food is received in the pharynx, the elevator muscles relax, the pharynx descends, and the constrictors contract upon the bolus, and convey it downward into the esophagus.