hypoblast


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hypoblast

[′hī·pō‚blast]
(embryology)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
For simplicity reasons, we emphasize that in the primitive streak region, where the cells are delaminating, two different types of interactions are possible: the microenvironment, 1 only with the hypoblast, exactly, in the middle region of the embryo (Figure 3) or the microenvironment 2, simultaneously with the hypoblast and the extraembryonic mesoderm in lateral ends of the embryonic disc (Figure 3).
After fertilization, first cleavage was observed within 2 h, second was between 3-4 h and after 4-6 h, a shield appeared inside and two-layered structure appeared with an outer epiblast and inner hypoblast. However, no further development was observed as the eggs succumb to fungal infection.
Otherresearches on broiler quail and turkey eggs have shown thatwarming eggs prior to a 12 to 15-d storage period improves hatchability as it helps the embryo to develop to the so- called hypoblast stage: a stage of embryonic development that is able to survive storage better (Kosin 1956; Fasenko et al.