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Related Experiment Videos

Do the cardiac glands exist? 5. The dog.

M Imai1, T Shibata, K Moriguchi

  • 1Department of Anatomy, Kanazawa Medical University, Ishikawa, Japan.

Okajimas Folia Anatomica Japonica
|March 1, 1990
PubMed
Summary

Histological and histochemical analysis reveals that canine cardiac glands are undifferentiated gastric glands. The clear zone represents an undifferentiated gastric region, while the dark zone is differentiated.

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Area of Science:

  • Gastroenterology
  • Histology
  • Histochemistry

Background:

  • Canine gastric and cardiac glands have distinct histological features.
  • Understanding the differentiation of gastric glands is crucial for comprehending gastric physiology.

Purpose of the Study:

  • To histologically and histochemically investigate canine cardiac and gastric glands.
  • To compare the differentiation status of cardiac and gastric glands.

Main Methods:

  • Histological examination of canine gastric and cardiac glands.
  • Histochemical staining (PAS and PAS-AB at pH 2.5) to identify cellular components and mucins.

Main Results:

  • Cardiac glands contain parietal cells and pepsinogen-positive cells with PAS-positive substances, indicating they are undifferentiated gastric glands.
  • The clear zone exhibits deep gastric pits and PAS-positive chief cells containing sialomucin, characteristic of an undifferentiated gastric region.
  • The dark zone shows shallow gastric pits and PAS-negative chief cells lacking sialomucin, signifying a differentiated gastric region.

Conclusions:

  • Canine cardiac glands are not distinct but represent undifferentiated gastric glands.
  • The clear zone of the gastric mucosa is an undifferentiated region.
  • The dark zone of the gastric mucosa is a differentiated region.

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