Chapter 25, Problem 2CT

Summary Introduction

To review:

The six sphincters from the oral cavity to the anus that control the movement of materials via the digestive tract. Also, the sphincter, over which an individual has conscious and voluntary control.

Introduction:

The sphincters are the valves formed by the thickening of the portions of the circular muscular layers. There are various sphincters that are present in the digestive tract. They constrict to ensure that only one-way passage of materials occurs along the lumen.