noun 下载 🔗分享 回肠 The last, and usually the longest, division of the small intestine; the part between the jejunum and large intestine. Examples : "During digestion, nutrients are absorbed into the bloodstream through the walls of the ileum. " 在消化过程中,营养物质会通过回肠的肠壁被吸收到血液里。 anatomy organ body physiology medicine biology 与AI对话词汇游戏阅读练习