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Egg Incubation Physiology - Anatomy & Physiology
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Revision as of 11:45, 22 July 2008
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11:45, 22 July 2008
→Changes in Composition of the Egg during Incubation
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== Changes in Composition of the Egg during Incubation ==
== Changes in Composition of the Egg during Incubation ==
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*As the embryo grows within the egg, the composition of the egg changes.
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* Both yolk and albumin diminish.
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** Yolk providing energy for growth and maintenance of the embryo.
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** Albumin providing protein for the embryo and giving up water, which is lost through pores in the shell.
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* Water is produced when yolk fat is oxidised.
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* Water lost from the egg is replaced by air, creating the 'air cell' at the blunt end of the egg.
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* Embryo punctures the chrioallantoic and internal shell membrane.
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** Able to begin pulmonary ventilation, rebreathing the 'air cell' gas.
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** Transition from diffusive respiration through the chorioallantois to breathing through the lungs.
== Heat Transfer to the Egg ==
== Heat Transfer to the Egg ==
Lwilkie
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