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Related Concept Videos

Mechanical and Chemical Digestion in the Small Intestine01:30

Mechanical and Chemical Digestion in the Small Intestine

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The small intestine plays a crucial role in our digestive system, performing both mechanical and chemical digestion.
Mechanical digestion in the small intestine involves movements such as segmentations and migrating motility complexes (MMCs), primarily controlled by the myenteric plexus. Segmentations are localized contractions occurring in areas of the intestine distended by chyme—a mixture of partially digested food. These contractions mix chyme with digestive juices, facilitating...
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Anatomy of the Intestines01:23

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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.
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Small Intestine01:15

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The small intestine is primarily responsible for digestion and nutrient absorption. It spans from the pyloric sphincter to the ileocecal valve and connects to the large intestine.
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The large intestine is divided into three main regions: the cecum, colon, and rectum. Extending from the ileocecal valve to the anus, it frames the small intestine on three sides.
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Regeneration is the process of restoring injured or lost tissues, organs, or body parts. While simpler organisms generally show greater ability to regenerate their whole body, few complex animals show similarly exceptional regeneration. For example, planarian flatworms have a unique regenerative potential making them a popular study organism among biologists to understand the mechanisms of whole body regeneration. Other organisms, such as hydra, also show extreme regeneration potential;...
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The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
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Related Experiment Video

Updated: Feb 13, 2026

Intestinal Epithelial Regeneration in Response to Ionizing Irradiation
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Mechanisms for intestinal regeneration.

Genia Dubrovsky1, James C Y Dunn2

  • 1Department of Surgery, David Geffen School of Medicine, University of California Los Angeles, Los Angeles.

Current Opinion in Pediatrics
|March 15, 2018
PubMed
Summary
This summary is machine-generated.

Recent breakthroughs in intestinal regeneration include culturing intestinal stem cells (ISCs) and engineering intestinal tissue. These advances pave the way for novel therapies for intestinal disorders.

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Area of Science:

  • Regenerative Medicine
  • Gastroenterology
  • Stem Cell Biology

Background:

  • Intestinal epithelial growth involves complex structures and pathways.
  • Intestinal regeneration is a rapidly advancing field with significant research activity.

Purpose of the Study:

  • To review key structures and pathways in intestinal epithelial growth.
  • To highlight current research areas in intestinal regeneration.
  • To discuss recent breakthroughs in stem cell culture and tissue engineering.

Main Methods:

  • Derivation and culture of intestinal stem cells (ISCs) from fibroblasts.
  • Xenogeneic-free culture of ISCs in hydrogels.
  • Co-culture of intestinal organoids with neural crest cells.
  • Utilizing endoluminal devices to induce tissue growth via mechanical force.

Main Results:

  • Successful culture of ISCs under xenogeneic-free conditions.
  • Formation of small intestinal tissues with neuromuscular networks using organoids and neural crest cells.
  • Demonstration of mechanical force-induced tissue growth using endoluminal devices.

Conclusions:

  • Recent advances in intestinal regeneration are promising for future therapies.
  • Novel treatments for various intestinal disorders may emerge from this research.
  • Challenges remain in translating these stem cell therapies for safe human application.