Yolk: Quick Facts

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Facts

Also Known As	deutoplasm • egg yolk

Photos

A close-up of a raw chicken egg yolk resting on a flat surface, surrounded by clear egg white.

Labeled diagram of an amniotic egg showing the embryo surrounded by membranes including the amnion, chorion, yolk sac, and allantois, with albumin, amniotic fluid, yolk, and shell also identified.

Labeled diagram of an animal egg cut in half, showing structural components including the outer shell layers, inner and outer membranes, yolk with its membrane and germinal disc, and albumen with thick and thin egg white, chalaza, and chalaziferous layer.

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