Figure 5

Cellular/tissular structure (5.1, 5.2) and ultrastructure (5.3) of the cellular mechanism of adherence of the oil drop (OD) to the oil covering layer (OCL). The OCL is a structure formed in the thickened area of the internal yolk syncytial layer (I-YSL) which primordial germ cells (PC) can be observed before the attachment of the OD to the syncytium (5.3). E-YSL external yolk syncytial layer, Ch chorion, EVL enveloping layer, Y yolk, E embryo.