ABSTRACT
The digestive system is made up of a series of organs within the gastrointestinal (GI) tract that have the task of transforming ingested food into nutrients that the human body uses. The human body is made up of cells that have undergone differentiation and have developed from a single origin, culminating in specialised organs and tissues, each of which has its own essential function. The development of the cell is encoded within the genome found within the deoxyribonucleic acid situated in the nucleus of each cell. The caudal foregut starts after the respiratory diverticulum and extends to the hepatocystic diverticulum. Derivatives of the caudal foregut include the oesophagus, stomach, proximal duodenum, liver, gall bladder, hepatic ducts, bile ducts and pancreas. Prior to birth the GI tract is sterile; however, within a few hours of birth a plethora of microorganisms begin by populating the mouth and eventually encompassing the whole length of the tract.
