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REctum
REctum
The rectum stores feces prior to defecation.
Internal Anal Sphincter
Internal Anal Sphincter
The internal anal sphincter is made of smooth muscle and thus, not under voluntary control.
External Anal Sphincter
External Anal Sphincter
The external anal sphincter is made of skeletal muscle and thus, under voluntary control.
Peritoneum
Peritoneum
The peritoneum is the serous membrane that lines the abdominal cavity.
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