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  2. Defecation - Wikipedia

    en.wikipedia.org/wiki/Defecation

    Death has been known to occur in cases where defecation causes the blood pressure to rise enough to cause the rupture of an aneurysm or to dislodge blood clots (see thrombosis). Also, in releasing the Valsalva maneuver blood pressure falls; this, coupled with standing up quickly to leave the toilet, can result in a blackout. [citation needed]

  3. Sphincter - Wikipedia

    en.wikipedia.org/wiki/Sphincter

    At the anus, there are two anal sphincters which control the exit of feces from the body, the internal anal sphincter and external anal sphincter. The inner sphincter is involuntary and the outer is voluntary. The microscopic precapillary sphincters function to control the blood flow into each capillary in response to local metabolic activity. [1]

  4. Excretory system - Wikipedia

    en.wikipedia.org/wiki/Excretory_system

    The dual function of excretory systems is the elimination of the waste products of metabolism and to drain the body of used up and broken down components in a liquid and gaseous state. In humans and other amniotes ( mammals , birds and reptiles ), most of these substances leave the body as urine and to some degree exhalation, mammals also expel ...

  5. How to Prevent and Treat Hemorrhoids, According to Doctors - AOL

    www.aol.com/lifestyle/prevent-treat-hemorrhoids...

    Of course, it’s natural to feel worried when you see blood in your stool. “Most of the time, that bleeding is not going to be from something more sinister like a cancer; it's usually going to ...

  6. Cloaca - Wikipedia

    en.wikipedia.org/wiki/Cloaca

    Cloaca of a red-tailed hawk. A cloaca (/ k l oʊ ˈ eɪ k ə / ⓘ kloh-AY-kə), pl.: cloacae (/ k l oʊ ˈ eɪ s i / kloh-AY-see or / k l oʊ ˈ eɪ k i / kloh-AY-kee), or vent, is the rear orifice that serves as the only opening for the digestive (), reproductive, and urinary tracts (if present) of many vertebrate animals.

  7. Human anus - Wikipedia

    en.wikipedia.org/wiki/Human_anus

    In humans, the anus (pl.: anuses or ani; from Latin ānus, "ring", "circle") [1] [2] is the external opening of the rectum located inside the intergluteal cleft.Two sphincters control the exit of feces from the body during an act of defecation, which is the primary function of the anus.

  8. Anal canal - Wikipedia

    en.wikipedia.org/wiki/Anal_canal

    This muscle is in a state of tonic contraction, but during defecation, it relaxes to allow the release of feces. Movement of the feces is also controlled by the involuntarily controlled internal anal sphincter, which is an extension of the circular muscle surrounding the anal canal. It relaxes to expel feces from the rectum and anal canal.

  9. Human digestive system - Wikipedia

    en.wikipedia.org/wiki/Human_digestive_system

    The celiac artery supplies the liver, stomach, spleen and the upper 1/3 of the duodenum (to the sphincter of Oddi) and the pancreas with oxygenated blood. Most of the blood is returned to the liver via the portal venous system for further processing and detoxification before returning to the systemic circulation via the hepatic veins.