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Upper Alimentary Tract. On embryologic grounds the gi tract should be divided into upper mouth to major papilla in the duodenum middle duodenal papilla to mid transverse colon and lower mid transverse colon to anus according to the. Oral pharyngeal and oesophageal phases of deglutition. The human gi tract can be divided into two halves namely. Alimentary tract alimentary canal.
Congenital anomalies of the upper gastrointestinal tract may manifest during the neonatal period or later in life even in adulthood. On embryologic grounds the gi tract should be divided into upper mouth to major papilla in the duodenum middle duodenal papilla to mid transverse colon and lower mid transverse colon to anus according to the. The gi or digestive tract extends from mouth to anus see the image below. The upper gi consists of the following organs. Normal deglutition comprises the prehension and mastication of ingesta followed by its transfer from the oro pharynx to the stomach. Deglutition is divided into three stages.
There are many supporting organs such as the liver which helps by secreting enzymes that are necessary for the digestion of food.
Congenital anomalies of the upper gastrointestinal tract may manifest during the neonatal period or later in life even in adulthood. Tumours of the oropharynx of domestic animals are common in most parts of the world but squamous cell carcinoma of the upper alimentary tract shows differences in prevalence in different geographical areas and occurs at different sites in the various species. The gastrointestinal tract gi tract git digestive tract digestion tract alimentary canal is the tract from the mouth to the anus which includes all the organs of the digestive system in humans and other animals food taken in through the mouth is digested to extract nutrients and absorb energy and the waste expelled as feces the mouth esophagus stomach and intestines are all part of. Biliary tract the organs ducts and other structures that participate in secretion the liver storage the gallbladder and delivery hepatic and bile ducts of bile into the duodenum. Congenital anomalies of the upper gastrointestinal tract may manifest during the neonatal period or later in life even in adulthood. Because many alimentary tract abnormalities are the result of abnormal embryogenesis an understanding of the normal development of the alimentary tract is helpful in understanding anomalous development.