embryo
Anatomical entity that comprises the organism in the early stages of growth and differentiation that are characterized by cleavage, the laying down of fundamental tissues, and the formation of primitive organs and organ systems. For example, for mammals, the process would begin with zygote formation and end with birth. For insects, the process would begin at zygote formation and end with larval hatching. For plant zygotic embryos, this would be from zygote formation to the end of seed dormancy. For plant vegetative embryos, this would be from the initial determination of the cell or group of cells to form an embryo until the point when the embryo becomes independent of the parent plant. Every claim on this page comes from the Leumas anatomy graph and carries its source.
What the embryo is
Anatomical entity that comprises the organism in the early stages of growth and differentiation that are characterized by cleavage, the laying down of fundamental tissues, and the formation of primitive organs and organ systems. For example, for mammals, the process would begin with zygote formation and end with birth. For insects, the process would begin at zygote formation and end with larval hatching. For plant zygotic embryos, this would be from zygote formation to the end of seed dormancy. For plant vegetative embryos, this would be from the initial determination of the cell or group of cells to form an embryo until the point when the embryo becomes independent of the parent plant. The atlas records it as an anatomical structure at the organ scale in the human body.
Where the embryo 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 embryo connects to
The atlas records 101 typed relationships for it, across 7 kinds of connection. a kind of multicellular organism.
Supply and innervation
This dataset asserts no arterial supply, venous drainage or innervation for the embryo. 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 embryonic organism, developing organism and developmental tissue. Searching any of those names reaches this page.
Source
Uberon multi-species anatomy ontology (Mungall et al.), CC BY 4.0. Term UBERON:0000922, version 2026-06-19, retrieved 2026-08-24. Licence: CC-BY-4.0.
- A kind of: multicellular organism.
- Adjacent to: chorion membrane.
- contains: anterior cardinal vein, aortic sac, basiotic bone, buccopharyngeal membrane, cardiogenic splanchnic mesoderm and chorionic villous mesenchyme, and 79 more.
- develops into: blood, digestive tract, dorsal motor nucleus of vagus nerve, falx cerebri, ganglion and nervous system, and 1 more.
- subtype: blastocyst, gastrula, late embryo and morula.
- surrounded by: amnion and amniotic fluid.
- connects: umbilical cord.
Questions
Where is the embryo?
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 embryo connect to?
A kind of: multicellular organism.
Is the embryo 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.