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In continent individuals, the rectum can expand to a degree to accommodate this function.
en.wikipedia.org As the waste fills the rectum and expands the rectal walls, nervous system stretch receptors in the rectal walls stimulate the desire to defecate.
en.wikipedia.org Prostate cancer most commonly metastasizes to the bones, lymph nodes, and may invade rectum, bladder and lower ureters after local progression.
en.wikipedia.org From this point the intestine, or rectum, forms a long straight tube.
en.wikipedia.org The pelvic cavity primarily contains reproductive organs, the urinary bladder, the pelvic colon, and the rectum.
en.wikipedia.org