Rectum: Facts, Function & Health Information

The rectum is the final section of the large intestine, connecting the sigmoid colon to the anus. It's 15–20 cm (6–8 inches) long, ~2.5 cm (1 inch) diameter, and stores stool until defecation.

Additional Facts

  • Lined with protective mucous membranes.
  • Contains sphincter muscles controlling stool passage.
  • Innervated by the pudendal nerve.
  • Susceptible to hemorrhoids, anal fissures, rectal prolapse.
  • Vital for waste elimination.

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