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Lovebewarsetalk:

you missed the point bradayya...egg shell has pores from which the shit and that smell permeates inside and spoils the egg-white, now don't ask me who will ever eat egg-white, now coming to egg-yellow, the same concept...egg-white has minute pores through which blah blah blah....

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quote:

The hen turns part of the cloaca and the last segment of the oviduct inside out, "like a glove." The described red membrane is then everted inside of these organs. The egg emerges far outside, at the end of the bulge. So it cannot contact the walls of the cloaca and get contaminated by stools or urine. Moreover, the intestine and inner part of the cloaca are kept shut by the emerging egg, and their contents cannot leave when the hen strains to deliver the egg. Therefore, eggs are always clean as they are laid. However, sometimes a hen, stomping around the nest with dirty feet, will get the egg dirty anyway.

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