RID29588 inner muscle layer of organ region
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RID29589 circular muscle layer of segment of large intestine
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RID29590 circular muscle layer of cecum
RID29591 circular muscle layer of colon
RID29592 circular muscle layer of rectum
RID29593 circular muscle layer of ascending colon
RID29594 circular muscle layer of transverse colon
RID29595 circular muscle layer of descending colon
RID29596 circular muscle layer of sigmoid colon