Tags: Anatomical Structure, Embryology.
In all bilaterian animals the mesoderm is one of the three primary germ layers in the very early embryo. The other two layers are the ectoderm (outside layer) and endoderm (inside layer) with the mesoderm as the middle layer between them.The mesoderm forms mesenchyme (connective tissue) mesothelium non-epithelial blood cells and coelomocytes.
