zona pellucida

A glycoprotein membrane surrounding the plasma membrane of an oocyte. It is a vital constitutive part of the latter, external but not extraneous to it. The zona pellucida first appears in multilaminar primary oocytes. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the zona pellucida is

A glycoprotein membrane surrounding the plasma membrane of an oocyte. It is a vital constitutive part of the latter, external but not extraneous to it. The zona pellucida first appears in multilaminar primary oocytes. The atlas records it as a region at the region scale in the human body.

Where the zona pellucida is

It sits within the reproductive system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What the zona pellucida connects to

The atlas records 3 typed relationships for it, across 2 kinds of connection. part of ovary.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the zona pellucida. Only a minority of structures carry those edges here, so an empty answer means nothing has been recorded — not that there is nothing to record.

Also called

Also recorded as zona pellucida - vitelline membrane, oolemma, pellucid zone, striated membrane, vitelline envelope and vitelline membrane, and 2 more. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0000086, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• Part of: ovary.
• A kind of: acellular membrane and anatomical structure.

Questions

Where is the zona pellucida?

It sits within the reproductive system. Not positioned individually. Drawn inside the structure this dataset says contains it — the containment is asserted, the exact spot within it is not.

What does the zona pellucida connect to?

Part of: ovary.

Is the zona pellucida the same in other species?

Leumas holds the same relationship vocabulary for every species it carries, so where another dataset records this structure you can put the two side by side on /compare.