How can a ? chick in egg get its blood circulation

1.	How can a ? chick in egg get its blood circulation
Answer» It develops nerves and veins within the egg itself The circulation in the chick embryo is comparable to that of the mammalian fetus(1, 8). The left and right chorioallantoic arteries bring the deoxygenated blood into contact with CAM where gas exchange through the egg shell occurs and the chorioallantoic vein returns the oxygenated blood to the embryo

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