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Anatomy of the Intestines01:23

Anatomy of the Intestines

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Although digestion of proteins, carbohydrates, and lipids may begin in the stomach, it is completed in the intestine. The absorption of nutrients, water, and electrolytes from food and drink also occurs in the intestine. The intestines can be divided into two structurally distinct organs—the small and large intestines.
Small Intestines
The small intestine is an ~7 meter-long tube with an inner diameter of just 2.5 cm. Since most nutrients are absorbed here, the inner lining of the...
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Related Experiment Video

Updated: Jul 30, 2025

Author Spotlight: Gastric Epithelial Cell Responses in Helicobacter pylori infection
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Profiling the human intestinal environment under physiological conditions.

Dari Shalon1, Rebecca Neal Culver2, Jessica A Grembi3

  • 1Envivo Bio, Inc., San Francisco, CA, USA.

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Summary
This summary is machine-generated.

A new ingestible device collects intestinal samples, revealing distinct gut microbiome and metabolome profiles compared to stool. This technology advances understanding of gut physiology and disease by enabling multi-regional analysis during normal digestion.

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Area of Science:

  • Gastroenterology
  • Microbiology
  • Systems Biology

Background:

  • The gut microbiome, proteome, and metabolome influence intestinal physiology and disease.
  • Current methods using stool samples or limited endoscopy hinder comprehensive gut analysis.
  • Understanding regional gut biochemical activity is crucial but limited.

Purpose of the Study:

  • To develop an ingestible device for multi-regional intestinal sampling during normal digestion.
  • To compare intestinal and stool samples using multi-omics analyses.
  • To investigate the spatiotemporal distribution of gut microorganisms, host proteins, and metabolites.

Main Methods:

  • Development of an ingestible device for collecting samples from multiple intestinal regions.
  • Collection of 240 intestinal samples from 15 healthy individuals.
  • Multi-omics analyses (microbial, proteomic, metabolomic) of collected samples.

Main Results:

  • Significant differences found between intestinal and stool samples in bacteria, phages, host proteins, and metabolites.
  • Differential enrichment of microbial taxa and increased prophage induction in the intestines compared to stool.
  • Intestinal host proteome and bile acid profiles varied regionally and differed from stool; identified microbial alterations in bile acid metabolism.

Conclusions:

  • The ingestible device enables non-invasive, longitudinal profiling of the intestinal tract under physiological conditions.
  • Findings highlight regional differences in the gut microbiome and metabolome, distinct from stool.
  • This approach can elucidate the roles of the gut microbiome and metabolome in human health and disease.