Which of the following is derived from endoderm?: (A) Gall bladder, (B) Lens, (C) Spleen, (D) Lymph nodes
Answer is A. HUMAN EMBRYOLOGY-INDERBIR SINGH TENTH EDITION-PAGE NO:203 The pars cystica of the hepatic bud gives origin to the gallbladder and to the cystic duct. the pa of the hepatic bud proximal to the pars cystica forms the bile duct (Hepatic bud is endodermal in origin)