The gastrointestinal tract git arises initially during the process of gastrulation from the endoderm of the trilaminar embryo week 3 and extends from . Department of pediatrics harvard medical school and department of medicine division of gastroenterology childrens hospital medical center boston massachusetts. The human gastrointestinal gi tract comprises the foregut midgut and hindgut and each region gives rise to different tissues and organs 1 4 the foregut
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