endoderm
/ˈɛndoʊˌdɜrm/
noun
- The innermost layer of cells in an early embryo, which later develops into the lining of the digestive tract, lungs, and other internal organs.
- Damage to the endoderm can affect how the digestive system forms.
- The endoderm forms the lining of the stomach and intestines during development.
- In the early embryo, the endoderm is one of three primary germ layers.