extraembryonic structure

A multicellular anatomical structure that is associated with an embryo and derived from the zygote from which it develops, but which does not contribute to the embryo proper or to structures that are part of the same organism after embryogenesis. Every claim on this page comes from the Leumas anatomy graph and carries its source.

What the extraembryonic structure is

A multicellular anatomical structure that is associated with an embryo and derived from the zygote from which it develops, but which does not contribute to the embryo proper or to structures that are part of the same organism after embryogenesis. The atlas records it as a region at the region scale in the human body.

Where the extraembryonic structure 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 extraembryonic structure connects to

The atlas records 9 typed relationships for it, across 3 kinds of connection. a kind of anatomical structure and developing anatomical structure.

Supply and innervation

This dataset asserts no arterial supply, venous drainage or innervation for the extraembryonic structure. 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 extra-embryonic structure, extraembryonic structures and extraembryonic tissue. Searching any of those names reaches this page.

Source

Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0000478, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.

• A kind of: anatomical structure and developing anatomical structure.
• subtype: amniotic ectoderm, amniotic mesoderm, chorionic immature intermediate villus, chorionic mesenchymal villus, chorionic villous mesenchyme and umbilical cord.
• contains: umbilical ring.

Questions

Where is the extraembryonic structure?

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 extraembryonic structure connect to?

A kind of: anatomical structure and developing anatomical structure.

Is the extraembryonic structure 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.