Despite the fact that you utilize eggs frequently, you most likely uninformed about white, ropey part found in a raw egg is.
That is chalaza.
Chalazae are found on the two sides of the yolk. Their job is to hold the yolk in the center point of the egg.
Chalazae are a type of protein. They are associated both the yolk and the eggshell's coating. You can see them when you are attempting to remove the egg whites.
Chalazae are consumable and they even indicate if the egg is still fresh as they vanish when the egg itself is getting older.