The membrane that surrounds the yolk in the incubating egg
Figure 1. Broken-out incubated chicken egg suspended in water. Source: Jacquie Jacob, University of Kentucky.
For more information:
Incubation and embryonic development. University of Illinois.
Embryology in the classroom. Pennsylvania State University.
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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.