How do the chalazae help keep an embryo positioned inside an egg?

The chalazae are two spiral bands of protein found in the egg white that extend from the yolk and attach to the lining membrane at opposite ends of the egg. By acting as anchors, these structures help suspend the yolk within the albumen, keeping the embryo—which develops on the surface of the yolk—properly positioned and centered within the egg. This stabilization helps protect the developing embryo from coming into contact with the shell or other internal membranes.12