Chalaza

Definition

A structure within eggs, including those of insects, that helps in anchoring the developing embryo. It consists of twisted filaments that maintain the yolk and the embryo in place.

Etymology

From Greek 'khalaza', meaning 'hailstone' or 'hard lump'.

Example

During the dissection of the insect egg, the chalaza was observed anchoring the yolk in position.

Synonyms

• Egg anchor

Related Terms

• Yolk
• Embryo
• Insect egg

Usage Notes

The chalazae play a crucial role in ensuring proper development of the embryo by maintaining its position within the egg.