Chalaza - Cords that keep the yolk in the centre., Germinal disc - If an egg is fertilised, the sperm enter through the germinal disc and travel to the centre of the yolk, where an embryo is formed., Albumen - This is made of water and protein. It cushions the yolk and provides nutrition for a developing embryo., Shell Membranes - This stops bacteria passing through to the growing embryo., Shell - Protects the inside of the egg. It contains thousands of small pores to allow air to move through the shell., Yolk - Contains proteins and fats that provide the main source of nutrition for the embryo., Air Cell/Sac - Formed when the egg cools down. , Vitelline Membrane - Around the yolk and keeps it in shape. ,
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Parts of an Egg defintions
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