extraembryonic ectoderm

ex·tra·em·bry·on·ic ec·to·derm

derivative of epiblast outside the embryo's body.
References in periodicals archive ?
Furthermore, the visceral endoderm interacts with a second thick-walled and cup-shaped tissue: the extraembryonic ectoderm (ExE) occupies an opposite position to the epiblast (Figure 1), and, apparently, there is no equivalent structure in humans (Figure 1).
Proximal visceral endoderm and extraembryonic ectoderm regulate the formation of primordial germ cell precursors.