yolk cells

yolk cells

primordial embryonic cells lying between the endoderm and mesoderm; they probably give rise to the endothelium of vitelline vessels.
References in periodicals archive ?
A classification of the stages of embryonic development was determined, based on the morphological characteristics of the yolk cells, epidermis, and the development of the digestive and nervous systems.
Two types of yolk cells are distinguishable, both larger than egg cells.
All the yolk cells, which were placed around the embryo in the previous stage, are absorbed into the embryo.
2006), the second type of yolk cells of Schmidtea polychroa (Schmidt, 1861), the so-called fusiform yolk cells, differentiates from spherical yolk cells.
tigrina), formation of a embryonic gut cavity which contains the yolk cells engulfed by the embryonic pharynx (stages III of P.
In most arthropod species, the yolk nuclei or yolk cells function only as vitellophages, degenerating before the end of embryonic development (Anderson, 1973; Campos-Ortega and Hartenstein, 1997).