Preferred Label : polar trophectoderm;
Uberon definition : Trophectoderm that surrounds the inner cell mass (ICM).;
Uberon related term : polar trophoblast;
Uberon Development note : unlike mural trophectoderm cells which stop proliferating and become large polyploid
cells (the primary trophoblastic giant cells) by endoreduplication, polar trophectoderm
cells remain diploid, continue to proliferate and give rise to both the ectoplacental
cone and the extraembryonic ectoderm[MP];
Uberon Homology note : (...) the trophoblast develops rapidly so that contact may be made with the maternal
uterine tissues when conditions are appropriate. We have here an excellent example
of an embryonic adaptation, the development of a structure never present in either
adult or embryo of 'lower' vertebrates.[well established][VHOG];
Origin ID : 0006280;
adjacent to
- develops from
- part of
Trophectoderm that surrounds the inner cell mass (ICM).
