MeSH definition : The three primary germinal layers (ECTODERM; ENDODERM; and MESODERM) developed during
GASTRULATION that provide tissues and body plan of a mature organism. They derive
from two early layers, hypoblast and epiblast.;
The three primary germinal layers (ECTODERM; ENDODERM; and MESODERM) developed during
GASTRULATION that provide tissues and body plan of a mature organism. They derive
from two early layers, hypoblast and epiblast.