How does a chalaza on an egg help it?

The chalaza is a twisted structure of protein strands that anchors the yolk in place within the egg white, helping to keep the yolk centered. This positioning is crucial for the developing embryo, as it ensures that the yolk receives proper nutrients and protection during incubation. Additionally, the chalaza provides stability, preventing the yolk from coming into direct contact with the eggshell, which could lead to damage. Overall, the chalaza plays an essential role in maintaining the integrity and viability of the egg.