Describe the function of the digestive system. How does the digestive system work? What role do villi play in the digestive process? What is the main function of digestion? How does the digestive system contribute to energy metabolism?
Also known as: gullet, oesophagus Written and fact-checked by The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree...
The gastrointestinal tract is a hollow tube stretching from the oral cavity through the oesophagus, stomach, small intestine, colon, and rectum to the anal sphincter. Its function is the transport, digestion, and elimination of ingested material to supply nutrients, vitamins, minerals, and ...
The circular and longitudinal form of muscles are found on the walls of the pharynx in which the circular muscles help to push the food into the oesophagus and prevent the airflow while swallowing whereas the longitudinal muscles help to lift the walls while swallowing. Pharynx Structure The phar...
In addition to protecting the oral tissues from dehydration, saliva has a major function in mechanical food and microbial debrislavage. Salivarymucustends to take a relatively constant course along specific routes to the oesophagus,11,12with the salivary flow rate, tongue movements and swallowing ref...
Lundell L (1992) Acid suppression in the long-term treatment of peptic stricture and Barrett’s oesophagus. Digestion 51 (Suppl 1): 49–58PubMedCrossRef 83. Venables TL, Newland RD, Patel AC, Hole J, Copeman MB, Turbitt ML (1997) Maintenance treatment for gastro-oesophageal reflux disease...
The aim of this study was to provide data on the morphology of the gastrointestinal tract of Ad茅lie penguins (Pygoscelis adeliae). It was found to consist of a long oesophagus, a two-chambered stomach, a small intestine measuring only 5.2脳body length, two rudimentary caeca and a short ...
A catheter-based method to detect the presence of food, fluid or gas within the lumen of the oesophagus. Measuring impedance at multiple sites (multichannel) allows for determination of the direction of movement of oesophageal contents. Combined with pH measurement, this technique is considered the...
There is no peritrophic membrane in the lumen of either the hepatopancreas or the hindgut.Fragments of food pass via the oesophagus to the proventriculus of the foregut where they are briefly masticated before passing rapidly into the anterior chamber of the hindgut. During this process, the ...
Further they may restore the head region to its original shape after feeding, thus acting as retractors. Marginal muscles of the oesophagus are well developed and are thought to assist in the closure of the complex oesophageal lumen lining. The structure of the anterior feeding apparatus in M....