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