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To investigate the development and histogenisis of the yolk sac in chicks during early incubation and post-hatching stages.

March 6, 2026Open Access

Histogenesis of the yolk sac in the chick

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To investigate the development and histogenisis of the yolk sac in chicks during early incubation and post-hatching stages.
Studied yolk sac formation from the 3rd day of incubation to the 8th day post-hatching.
Analyzed cellular structures including entoderm, mesoderm, and vascular layers.
Monitored protein assimilation through pinocytosis and phagocytosis at various incubation stages.
Hemopoiesis peaked between the 11th and 13th days of incubation.
Glycogen content reached a maximum between the 7th and 9th days.
Alkaline phosphatase activity localized between apical and basal cytoplasm at different incubation stages.
Lipid absorption was highest during the latter part of incubation.

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Examines yolk sac development in chicks from incubation to post-hatching, implying critical growth stages.

Bernhard Henricus Jozef Juurlink (1971) studied this question.

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