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[Embryonic development of the human duodenum].

V M Petrenko

    Arkhiv Anatomii, Gistologii I Embriologii
    |November 1, 1986
    PubMed
    Summary

    Human embryonic development of the duodenum begins with pancreatic epithelial germ formation. This organ anlage develops a three-layered wall and a characteristic arch shape during early embryogenesis.

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    Area of Science:

    • Developmental biology
    • Human embryology
    • Gastrointestinal development

    Context:

    • The formation of the duodenal anlage is a critical early event in human embryogenesis.
    • It occurs concurrently with the development of pancreatic epithelial structures.
    • The initial stages involve the formation of an arch with a distinct middle ductal enlargement.

    Purpose:

    • To describe the morphological development of the human duodenal anlage.
    • To correlate duodenal development with pancreatic germ formation.
    • To elucidate the structural changes leading to the characteristic duodenal shape in early human embryos.

    Summary:

    • The epithelial duodenal anlage initiates at the end of the first month of human embryogenesis, coinciding with pancreatic epithelial germ appearance.
    • By 5.5-6 weeks, the anlage forms a three-layered structure, developing into an arch with a spindle-like middle ductal part, connected to the pancreatic head.
    • By 8-8.5 weeks, intensive pancreatic growth drives the duodenum's expansion into superior, descending, and inferior parts, forming a semicircular shape, initially a spiral coil due to uneven growth.

    Impact:

    • Provides a detailed timeline of early duodenal and pancreatic development.
    • Enhances understanding of normal gastrointestinal morphogenesis.
    • Establishes a foundation for studying congenital duodenal anomalies.

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