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Related Concept Videos

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Gastrointestinal or GI motility disorders are characterized by irregular gastrointestinal tract movements, disrupting food transit from the mouth to the anus. They are caused by damage or dysfunction in gut muscles or nerves. These disorders can cause symptoms such as severe constipation, diarrhea, abdominal pain, and swallowing difficulties. Disorders can affect any segment of the GI tract and range widely in severity, from common conditions like GERD to life-threatening conditions like...
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The GI tract, from beginning to end, is made up of four continuous tissue layers that adjust their structure according to their specific roles. These layers, from innermost to outermost, are known as the mucosa, submucosa, muscularis, and serosa, which are continuous with the mesentery.
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The human gastrointestinal (GI) tract is characterized by distinct physicochemical conditions that shape its microbial communities. Among these, the stomach presents a particularly challenging environment for microbial colonization due to its highly acidic pH, ranging from 1 to 3. This extreme acidity effectively limits microbial density. However, certain acid-tolerant microorganisms are capable of surviving in this niche. Notably, Helicobacter pylori can colonize the gastric mucosa,...
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The gastrointestinal (GI) tract, extending from the mouth to the anus, plays a pivotal role in the digestion and absorption of nutrients. This process involves both mechanical and chemical actions facilitated by various enzymes.
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The ageing gastrointestinal tract.

Stijn Soenen1, Christopher K Rayner, Karen L Jones

  • 1National Health and Medical Research Council of Australia (NHMRC), Centre of Research Excellence in Translating Nutritional Science to Good Health, The University of Adelaide, Royal Adelaide Hospital, South Australia, Australia.

Current Opinion in Clinical Nutrition and Metabolic Care
|November 13, 2015
PubMed
Summary
This summary is machine-generated.

Aging significantly impacts the gastrointestinal tract, affecting nutrient absorption and immune defenses. This review highlights age-related declines in gut function and increased susceptibility to digestive disorders and infections in older adults.

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Area of Science:

  • Gastroenterology
  • Gerontology
  • Immunology

Background:

  • Aging is associated with a decline in gastrointestinal function.
  • The gastrointestinal tract's defense system weakens with age.
  • Older adults face increased risks for gastrointestinal disorders.

Purpose of the Study:

  • To review the impact of aging on the gastrointestinal tract.
  • To examine effects on nutrient and drug absorption.
  • To assess changes in the gastrointestinal defense system.

Main Methods:

  • Literature review of recent publications.
  • Analysis of age-related changes in gut physiology.
  • Examination of immune system alterations in the gut.

Main Results:

  • Age-related decline in gut functions: taste, motility, gastric emptying.
  • Reduced nutrient absorption due to myenteric plexus and villi changes.
  • Impaired mucosal defense, immunity, and increased inflammation/oxidative stress.

Conclusions:

  • Aging affects esophageal, gastric, and colonic motility.
  • Older individuals are prone to malnutrition and incontinence.
  • Weakened gut immunity increases infection risk in the elderly.