History and Origin (Etymology) of Biological / Biochemical / Medical Terms
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ενδο/endo(=inside, internal, within)
δέρμα/derma(==skin beneath the epidermis)
> 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.
Endoderm is the innermost of the germ layers formed during animal embryogenesis; This type of cell layer produce the digestive tube and its associated organs (including the lungs).the other two are the mesoderm and ectoderm.