The deep circular layer of the tubulovestibular junction is thicker than that of the tubular esophagus. It looks like a sphincter which lies 27.06 2.11mm above the cardiac incisure.

 
  • 深层的环形肌纤维在管状食管与前庭连接处增厚;位于贲门切迹上方27.;06±2
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