ekstraembryonalt
Ekstraembryonalt (extraembryonal) describes components located outside the embryo proper but essential to its development. The term is used in embryology, anatomy, and pathology to differentiate structures that are part of the conceptus but are not part of the embryo itself.
Key examples are the extraembryonic membranes: amnion, chorion, and yolk sac, as well as the allantois in
Terminology: ekstraembryonalt is used to indicate tissue located outside the embryo and/or of extraembryonic lineage. It