What is An Egg?How Does it Hatch?
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As the eggs develop, water escapes through the shell in the form of water vapor. ... This water loss creates an air space at the broad end of the egg, where the chick is able to take its first breaths. With many species these first breaths happen three or four days before hatching.
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an egg is simply the membrane-bound vessel inside which an embryo can grow and develop until it can survive on its own.Fertile eggs can be hatched by using an egg incubator. An incubator is an enclosed structure with a fan and heater to keep eggs warm during the 21-day incubation period.
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