How is it that egg born animals do not have to breathe until they hatch from the egg?
In: Biology
They do have to breathe, they just breathe in the egg. As far as I know after a certain amount of time an air pocket forms in the egg that allows the animal to take in oxygen and exhale carbon dioxide, then that carbon dioxide escapes through loads of tiny pores in the egg and oxygen comes through them. I’m pretty sure that state only lasts a small amount of time compared to the rest of their time in the egg though.
For the rest of the time in the egg I believe they breathe by way of diffusion through the chorioallantoic membrane.
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