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Related Concept Videos

Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors01:24

Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors

Peptic ulcer disease, commonly called PUD, represents a multifaceted condition characterized by disruptions in the lining of the gastrointestinal (GI)  tract. Central to the protection of the gastrointestinal lining is the mucosal-bicarbonate barrier. This physiological defense mechanism is a formidable shield against the corrosive effects of gastric acid and pepsin secretion in the stomach. Its role is pivotal in maintaining the structural integrity of the stomach's inner lining. Bicarbonate,...
Oral Cavity01:11

Oral Cavity

The oral cavity, or the mouth, is a complex structure in humans that plays a vital role in our day-to-day lives. Its role is not only in chewing and swallowing food; it also plays a role in speech and facial expressions.
Teeth: The teeth are the hardest structures in our bodies. Humans have two sets of teeth throughout their lifetime: deciduous (baby) teeth and permanent teeth. Each tooth consists of several parts: the crown (visible part), the root (embedded in the jaw), enamel (hard outer...
Mucosal Barrier of the Stomach01:25

Mucosal Barrier of the Stomach

The gastric glands contain parietal cells that secrete hydrochloric acid (HCl) for digestion. The cells secrete HCl because it is highly corrosive and essential for breaking down food. To achieve this, they secrete hydrogen and chloride ions into the lumen of the gastric glands, which combine to form HCl.
Within parietal cells, carbonic acid is first formed through the reaction of water and carbon dioxide. The dissociation of carbonic acid releases bicarbonate and hydrogen ions. The bicarbonate...
Assessment of the Mouth01:26

Assessment of the Mouth

A thorough mouth assessment, including inspection and palpation of the lips, gums, tongue, tonsils, uvula, and pharynx, is crucial in detecting potential health issues. Diseases ranging from oral cancer to systemic conditions like diabetes could be identified early through careful oral examination. This article provides a detailed guide on conducting a comprehensive mouth assessment.
Mouth Inspection
The inspection begins with visually examining the mouth for symmetry, color, and size.
Peptic Ulcer Disease II: Pathophysiology01:28

Peptic Ulcer Disease II: Pathophysiology

Peptic Ulcer Disease (PUD) is characterized by the development of ulcers in the stomach or duodenal mucosa. Its pathophysiology is complex, involving a balance between damaging and protective elements.
Damaging agents such as Helicobacter pylori, gastric acid, pepsin, and nonsteroidal anti-inflammatory drugs (NSAIDs) can weaken the mucosal defense, allowing hydrogen ions to infiltrate back and harm epithelial cells.
Gastritis II: Pathophysiology01:26

Gastritis II: Pathophysiology

The pathophysiology of gastritis begins with the colonization of the stomach lining by Helicobacter pylori (H. pylori). This bacterium spreads mainly via the oral-oral route through saliva or shared utensils, and can also be transmitted in overcrowded or unhygienic environments through contaminated water, despite its brief survival outside the body.ColonizationOnce ingested, H. pylori enters the stomach and begins colonization by navigating through the mucus layer lining the stomach wall. It...

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Related Experiment Video

Updated: Jul 21, 2026

Using Unfixed, Frozen Tissues to Study Natural Mucin Distribution
11:39

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Published on: September 21, 2012

Oral mucosa: variations from normalcy, part II.

J M Seoane Leston1, A Aguado Santos, P I Varela-Centelles

  • 1Department of Oral and Maxillofacial Surgery, Faculty of Medicine and Dentistry, University of Santiago de Compostela, Spain.

Cutis
|April 5, 2002
PubMed
Summary

This article details five common oral mucosal variations: lateral soft palate fistulas, double lip, fissured tongue, racial gingival pigmentation, and geographic tongue. Understanding these conditions is key for accurate diagnosis and treatment.

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Area of Science:

  • Oral Medicine
  • Dermatology
  • Anatomy

Background:

  • The oral mucosa exhibits diverse variations, some deviating from typical presentations.
  • This article is the second in a series focusing on these variations.

Purpose of the Study:

  • To describe five specific conditions that represent deviations from normal oral mucosa.
  • To provide a comprehensive overview of less common oral mucosal variations.

Main Methods:

  • Descriptive review of five distinct oral mucosal conditions.
  • Clinical descriptions and characteristic features are presented.

Main Results:

  • Detailed descriptions of lateral soft palate fistulas.
  • Characteristics of double lip, fissured tongue, racial gingival pigmentation, and geographic tongue are elucidated.

Conclusions:

  • Recognition of these five variations is crucial for differentiating them from pathological lesions.
  • This knowledge aids in accurate diagnosis and appropriate patient management in oral medicine.