entoproct

例句：

1. 1. The entoproct is a crucial part of the digestive system.
   肠管是消化系统的重要组成部分。
2. 2. The entoproct plays a vital role in nutrient absorption.
   肠管在营养物质吸收中起着至关重要的作用。
3. 3. The entoproct is responsible for the movement of food through the body.
   肠管负责食物通过身体的过程。