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Related Concept Videos

Drugs Affecting GI Tract Motility: Other Laxatives01:20

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Laxatives are primarily used to alleviate constipation, a common gastrointestinal disorder characterized by infrequent bowel movements and difficulty passing stools. They work by various mechanisms to increase the volume or frequency of bowel movements. The primary modes of action of laxatives include increasing stool bulk, softening the stool, stimulating intestinal motility, and osmotically drawing water into the intestines.
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Digestive Functions of the Large Intestine01:20

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The large intestine is where the final stages of digestion happen. When the cecum receives chyme, it contains undigested carbohydrates that undergo fermentation. Gut bacteria ferment these carbohydrates to produce short-chain fatty acids that provide some energy and help synthesize essential vitamins.
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Feces Formation and Defecation01:26

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After spending 3 to 10 hours in the large intestine, chyme loses a lot of water and becomes feces, the final product of digestion. Feces consist of undigested dietary fiber such as cellulose, mucus, sloughed-off epithelial cells, and microbes. The descending and sigmoid colon stores feces and uses haustral contractions to dry it out but retains enough water to give it a semi-solid texture.
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Physiology of the Gastrointestinal System III: Elimination01:26

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The gastrointestinal elimination process involves a complex interplay of neural and hormonal mechanisms that coordinate the final waste removal from the body. This intricate operation encompasses the absorption of water and electrolytes, vital for transforming the remaining indigestible food matter into feces. The large intestine is pivotal in water and electrolyte absorption, forming feces from unabsorbed minerals, undigested food, bacteria, bile pigments, and shed epithelial cells. Essential...
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Assessment of the Rectum and Anus01:25

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Evaluating the rectum and anus plays a crucial role in conducting a thorough physical examination of the gastrointestinal system. Although it may be uncomfortable and often embarrassing for the patient, it holds immense diagnostic value, particularly in detecting gastrointestinal diseases and abnormalities. This guide will explain how to perform this assessment using inspection and palpation methods.
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Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
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Related Experiment Video

Updated: May 5, 2026

Murine Colitis Modeling using Dextran Sulfate Sodium DSS
08:39

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How well does stool form reflect colonic transit?

L P Degen1, S F Phillips

  • 1Division of Gastroenterology, Mayo Clinic, Rochester, Minnesota 55905, USA.

Gut
|July 1, 1996
PubMed
Summary
This summary is machine-generated.

Stool form is linked to colon transit time, with hard stools indicating slow transit and loose stools indicating fast transit. However, stool form is not associated with gastric emptying or small bowel transit.

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Area of Science:

  • Gastroenterology
  • Human Physiology
  • Digestive Health

Background:

  • The relationship between stool consistency and intestinal transit speed is not fully understood.
  • Specific regional gut transit data in relation to stool form is lacking.
  • Interindividual variability in these measurements requires further investigation.

Purpose of the Study:

  • To investigate the correlation between stool form and gastric emptying.
  • To examine the relationship between stool form and small bowel transit.
  • To determine the association between stool form and colonic transit.

Main Methods:

  • Utilized scintigraphy for regional gut transit assessment.
  • Quantified segmental colonic transit using radio-opaque markers.
  • Studied 32 healthy volunteers (men and women) across different menstrual phases and time points, standardizing diets and recording stool form on a seven-point scale.

Main Results:

  • A significant correlation was observed between hard stools and slow colonic transit.
  • Loose stools were significantly associated with fast colonic transit.
  • No significant relationship was found between stool form and gastric emptying or small bowel transit.

Conclusions:

  • Stool form is a reliable indicator of colonic transit time.
  • Gastric emptying and small bowel transit do not appear to influence stool form.
  • Further research may explore other factors affecting stool form and upper gut transit.