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The development of the chick embryo gallbladder studied by scanning electron microscope
S Gheri Bryk1, G Gheri, P Pacini
1Department of Human Anatomy and Histology, University of Florence, Italy.
Anatomischer Anzeiger
|January 1, 1990
Summary
Chick embryo gallbladder development shows surface folds and specialized cells emerging by day 12, enhancing its water absorption function for hatching needs.
Area of Science:
- Developmental Biology
- Histology
- Embryology
Background:
- The gallbladder's role in embryonic development is crucial for digestive preparation.
- Understanding gallbladder mucous membrane differentiation provides insights into organogenesis.
Purpose of the Study:
- To investigate the morphological changes in chick embryo gallbladder mucous membrane during late incubation.
- To correlate structural development with the emerging functional capacity of the embryonic gallbladder.
Main Methods:
- Scanning electron microscopy was employed to examine gallbladder tissues.
- Study encompassed chick embryos from day 11 of incubation to hatching (Hamburger and Hamilton stages 37-46).
Main Results:
- Gallbladder surface transitioned from smooth to complex folds between days 11 and 15.
- Epithelial cells developed dome-shaped apices and numerous microvilli from day 12 onwards.
- Specialized secretory cells appeared by day 15, indicating functional maturation.
Conclusions:
- Gallbladder mucous membrane undergoes significant morphological differentiation during late chick embryogenesis.
- Structural changes, including fold formation and specialized cell development, support the organ's water-absorbing function.
- This functional development is essential for meeting the chick embryo's digestive demands prior to hatching.