Assertion: zygote's cell | /r/HasAspect | origin
Facets:
value: in the yolk sac
type: LOCATION
value: outside the body of the embryo
type: LOCATION
Source sentences:
text: For example, the cells which will become either ova or sperm cells (the primordial germ cells) have origin outside the body of the embryo in the yolk sac, and they migrate in to the forming embryonic body to find the genital ridges where they will further develop in what will become either ovaries or testes.