has developmental contribution from has potential to develop into existence starts during gastrula stage endoderm mesoderm digestive tract presumptive structure presumptive gut BILA:0000084 The endodermal cells generate only the lining of the digestive tube and its glands; mesodermal mesenchyme cells will surround this tube to provide the muscles for peristalsis UBERON:0007026 UMLS:C1514442 embryonic digestive tube future digestive tract future digestive tube future gut primitive gut primordial digestive tube primordial gut uberon