Summary of Endoderm
The three germ layers ectoderm, mesoderm, and endoderm give rise to their own tissues and organs during the embryonic period, which occurs from the third to the eighth week of development. Endoderm forms the linings of the gastrointestinal and respiratory tracts as well as the urinary bladder. It also gives rise to the thyroid, parathyroids, liver, pancreas, and reticular stroma of the tonsils and thymus.
Flashcards on Endoderm
The main organ system derived from endoderm is the .