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Complete digestion with histological features
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  • Science
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  • Secondary School

Digestion is a complex biological process that involves the breakdown of food into smaller components that the body can absorb and utilize for energy, growth, and repair. The process occurs in several stages and involves various organs and enzymes. Here's a detailed overview of digestion: ### 1....

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Document information

  • October 12, 2024
  • 51
  • 2024/2025
  • Class notes
  • Dr.punit
  • All classes

Subjects

  • oral cavity
  • esophagus stomach
  • liver
  • histological structure
  • lining of esophagus

Written for

  • Secondary school
  • Secondary School
  • Science
  • 2
All documents for this subject (2)

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Structural and functional characteristics of
the organs of the anterior part of the
digestive tube. Derivatives of the oral cavity




Punit Kumar
Karaganda Medical University
Karaganda, Kazakhstan

, Digestive system
• The digestive system consists of
• Alimentary canal
• Associated organs
(Tongue, teeth, salivary glands, pancreas, liver, and gallbladder).
• In the alimentary canal, food is processed biochemically and products
are absorbed into body.
• The various segments of the alimentary canal are morphologically
specialized for specific aspects of digestion and absorption.
• Epithelium and parenchyma originate from endoderm.
• Connective tissue, muscular components,
and peritoneal components originate from mesoderm

, The process of digestion
• Primary process: maceration, moistening, and formation into a bolus
• Takes place by the actions of the structures of the oral cavity and
salivary glands
• Food passes rapidly through the pharynx to the esophagus.
• Food passes more slowly through gastrointestinal tract (stomach and
small intestine).
• Major processes: digestion, solubilization, and absorption
• Undigested food and other substances within the alimentary canal,
such as mucus, bacteria, desquamated cells, and bile pigments, are
excreted as feces.

,

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