Question

The pharynx is unique structure of the respiratory tract because it is a shared space for air and ingested food. How does this function affect the epithelial layer of the pharynx? The cells become stratified to protect against friction.

Answer 1

Yes, the function of the pharynx as a shared space for air and ingested food affects the epithelial layer of the pharynx. The cells become stratified to protect against friction, as the passage of food and air can cause mechanical abrasion of the epithelial cells. The stratified epithelium provides an extra layer of protection against mechanical wear and tear, ensuring that the pharynx can perform its function without damage to its lining. The stratified epithelium also allows the pharynx to regenerate more quickly in case of injury.