chorion membrane

The outermost extraembryonic membrane of amniotes. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the chorion membrane is

The outermost extraembryonic membrane of amniotes. The atlas records it as a tissue at the tissue scale in the human body.

Where the chorion membrane is

This dataset records no region or system for it. No positional evidence of any kind. Drawn outside the body so it can still be found and counted, never inside it.

What the chorion membrane connects to

The atlas records 5 typed relationships for it, across 3 kinds of connection. a kind of extraembryonic membrane.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the chorion membrane. 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 chorion, chorion (vertebrates), embryonic chorion, fetal chorion, uterine chorion and chorion frondosum, and 1 more. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0003124, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• A kind of: extraembryonic membrane.
• Adjacent to: embryo.
• contains: chorionic immature intermediate villus, chorionic mesenchymal villus and chorionic villous mesenchyme.

Questions

Where is the chorion membrane?

This dataset records no region or system for it. No positional evidence of any kind. Drawn outside the body so it can still be found and counted, never inside it.

What does the chorion membrane connect to?

A kind of: extraembryonic membrane.

Is the chorion membrane 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.