RID31652 muscle layer of zone of small intestine
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RID31654 muscle layer of subdivision of duodenum
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RID31655 muscle layer of anterior wall of duodenum
RID31656 muscle layer of posterior wall of duodenum
RID31657 muscle layer of superior part of duodenum
RID31658 muscle layer of descending part of duodenum
RID31659 muscle layer of horizontal part of duodenum
RID31660 muscle layer of ascending part of duodenum
RID31661 muscle layer of duodenal ampulla