The function of the projections of the mucosa of the GI tract is to
Making the world better, one answer at a time. The function of the projections of the mucosa of the GI tract is secretions and absorption.Digestion is also aided by these projections.he function of the mucosa is to warm and humidify air entering through the nose as well as to help to filter out unwanted particles in the air. 7 people found this useful. Edit.