这个词是什么意思？
The region of the STOMACH at the junction with the DUODENUM. It is marked by the thickening of circular muscle layers forming the pyloric sphincter to control the opening and closure of the lumen.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D011708 · MeSH 2026。
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