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
Digestive biscuit Digestive biscuit A digestive biscuit, sometimes described as a sweet-meal biscuit, is a semi-sweet biscuit that originated in Scotland, and is popular worldwide. The digestive was first developed in 1839 by two Scottish doctors to aid digestion. The term "digestive" is derived from the belief that they had antacid properties due to the use of sodium bicarbonate when they were first developed. Historically, some producers used diastatic malt extract to "digest" some of the starch that existed in flour prior to baking. First manufactured in 1892, McVitie's digestive is the best-selling biscuit in the UK. A prominent feature in British