The innermost of the three primary layers of cells that form in early embryonic development, which becomes the digestive and respiratory systems.
From Greek 'endo-' (within) + 'derma' (skin), established as embryology developed in the 19th century.
Your entire digestive tract—from your mouth to your stomach to your intestines—comes from the endoderm, plus your lungs and liver; this one microscopic layer builds most of your organs that handle food and air.
Complete word intelligence in one call. Free tier — 50 lookups/day.