When you crack open an egg you will see the yellow part called the yolk. The yolk is surrounded by the clear white substance called albumen. As the embryo develops within the shell, it is protected by the albumen.
1. Seed coat, 2. Endosperm and 3. Embryo are three parts of a seed. The seed coat protects the inner parts of the seed; The endosperm nourishes the developing embryo and the embryo on germination develops in to a new plant.