absence of the middle of the three primary germ layers of the embryo (the others being ectoderm and endoderm) during gastrulation; mesoderm is the origin of connective tissues, myoblasts, blood, the cardiovascular and lymphatic systems, most of the urogenital system, and the lining of the pericardial, pleural, and peritoneal cavities
Synonyms
Exact Synonyms:
Failure of Mesoderm Formation
;
absence of mesoderm