superior rectal plexus

例句：

1. 1.The superior rectal plexus is responsible for the regulation of blood flow in the lower digestive tract.
   直肠上动脉丛负责调节消化道下段的血流。
2. 2. During surgery, it's important to understand the anatomy of the superior rectal plexus to avoid damaging vital structures.
   在手术中，了解直肠上动脉丛的解剖结构以避免损伤重要结构是很重要的。
3. 3. The superior rectal plexus plays a crucial role in the maintenance of healthy bowel function.
   直肠上动脉丛在保持肠道健康功能方面起着至关重要的作用。