Development of the digestive system As a result of the cephalocaudal and lateral folding of the embryo, a portion of the endoderm-lined yolk sac cavity is incorporated into the embryo to form the primitive gut. In the cephalic and caudal parts of the embryo, the primitive gut forms a tube, the foregut and hindgut, respectively. The middle part, the midgut, remains temporally connected to the yolk sac by means of the vitelline duct. The foregut gives rise to the esophagus, the trachea, lung buds, the stomach, and the duodenum proximal to the entrance of the bile duct. In addition, the liver, pancreas, and biliary apparatus
Acidic (band) cover the medical expenses of Deftones bass player Chi Cheng. ACIDIC is also involved with The Leukemia & Lymphoma Society, which helped drummer Matt Whitaker and his family during his battle with cancer. The band has supported that organization since 2008, playing at Light the Night walk-a-thon events and Man/Woman of the Year fundraisers. They worked with Charitybuzz in the spring of 2010, auctioning a guest slot in the band at one of their Whisky a Go Go concerts, which was won by a 17-year-old guitarist from Seattle. Critical raves continue to pour in for ACIDIC on CD and onstage.