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Enterocyte dynamics and mucosal development in the posthatch chick.

A Geyra1, Z Uni, D Sklan

  • 1Faculty of Agriculture, Food and Environmental Quality Sciences, Hebrew University of Jerusalem, Rehovot, Israel.

Poultry Science
|July 10, 2001
PubMed
Summary
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The chick small intestine rapidly matures posthatch, with significant enterocyte and crypt development within 24 hours. Different intestinal segments show distinct growth patterns, similar to neonatal mammals.

Area of Science:

  • Avian biology
  • Gastrointestinal physiology
  • Developmental biology

Background:

  • The small intestine of newly hatched chicks undergoes rapid development.
  • Understanding enterocyte dynamics and mucosal morphology is crucial for avian health.

Purpose of the Study:

  • To investigate the morphological changes in the small intestinal mucosa and enterocyte dynamics in posthatch chicks up to 12 days.
  • To compare the ontogenetic timetables of different small intestinal segments.

Main Methods:

  • Microscopic examination of small intestinal tissues from posthatch chicks (0-12 days).
  • Analysis of enterocyte morphology, crypt development, and villus surface area.
  • Assessment of cell proliferation rates along the villus and in crypts.

Related Experiment Videos

Main Results:

  • Enterocytes transition from round to elongated within 24 hours posthatch.
  • Crypt invagination and increased crypt numbers occur by 48 hours, with proliferation decreasing significantly within 2-6 days.
  • Duodenum, jejunum, and ileum exhibit distinct villus growth patterns and surface area expansion, with the jejunum showing the greatest increase in absorptive area after 3 days.

Conclusions:

  • The hatching chick's small intestine matures rapidly, mirroring neonatal mammals, with critical changes in the first 24 hours.
  • Segment-specific ontogenetic timetables govern small intestinal development in chicks.