pores` - tiny holes in the shell for oxygen to enter and carbon dioxide to exit, shell - the hard outer surface of the egg, air pocket - tiny pocket of air , yolk - the yellow part of the egg that contains all the food the chick needs, chalaza - tiny strands that hold the yolk in the center of the egg, embryo - the spot on the yolk that will grow into the chick, membranes - the egg's main defense against germs, albumen - protects the contains water for the chick,

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