> δέρμα --> δεσμά/desma(=bonds) because skin keeps the body tight
Karl Ernst von Baer (1792 - 1876 )
> δέρω/dero(=to peel, to flay)
Robert Remak (1815-1865)
German anatomist Christian Heinrich Pander(1794-1865)first described the existence of three germ layers in chick embryos. The concept was later extended by Esthonian embryologist Karl Ernst von Baer (1792 - 1876 ) to include all vertebrates. Finally Prussian embryologist Robert Remak (1815-1865) coined the names of trhee layers.
Ectoderm is the outmost of the germ layers formed during animal embryogenesis; This type of cell layer produces blood, heart, kidneys, gonads, bones, muscles, connective tissues.The other two layers are the mesoderm and ectoderm.