V is for vitelline membrane. This is a gossamer-fine, multi layered, protein membrane separating the yolk from the white (albumen) in the egg. The fine twisted cord seen in the tweezer is one of the chalazae, holding the yolk in position. The developing embryo is attached to this membrane and floats to the surface — one of the reasons we turn the eggs first one way then the other. If we always turn them in the same direction, the chalazae winds up into a knot.
