Yolk core

**The vitelline nucleus** is an organoid formation that is present in the eggs of some species of arthropods and underlies the reproductive cycle. In this article we will look at the role of the yolk nucleus in the development of eggs, as well as its features and functions in the arthropod body.

Morphology of the vitelline nucleus The vitelline nucleus consists of a mixture of granular and fibrillar components, which have different functional significance. The granular component is represented by glycogen granules, proteins and organelles, and the fibrillar component is fibrils