What is an alimentary channel?

The human alimentary channel, also called gastrointestinal (GI) tract, consists of all structures from the mouth to the rectum, through which they consume and spend food, and the waste is excreted. The structures of the alimentary canal include mouth, pharynx, esophagus, stomach, intestines and rectum. The GI tract of a mature man measures approximately 20 feet (6.5 meters). The alimentary channel can be divided into the upper tract of GI and the lower GI tract.

The upper GI tract consists of mouth, pharynx, esophagus, stomach and duodenum, the highest part of the small intestine. The mouth, also called the buccal cavity or oral cavity, contains a number of structures that help in the initial digestion of food, namely salivary gland, tongue and teeth. The pharynx, part of the neck directly behind the mouth, is used to direct food into the esophagus and prevents it from entering the trachea or trachea.

The esophagus helps to move the meal towards the stomach through the peristalsis, the type of muscle contraction similar to waves. The second phase of digestion takes place in the stomach. When the fission food comes out of the stomach, inIt steps into the duodenum, where the digestive juices of the liver and the pancreas are combined.

The

lower GI tract consists of most of the intestines and rectum. The intestines are divided into small and large intestines, both of which have three heads. Two parts of the small intestine are included in the lower tract GI, Junum and Ilium.

JOUNUM is an intermediary of small intestine. It moves food from the duodenum to Ilium through peristalsis and helps in the absorption of nutrients. Most nutrient absorption takes place in Iliu, which is lined with villi, microscopic projections similar to finger, which increase the surface area for greater absorption. All soluble molecules are absorbed into the blood in Ilio.

The large intestine consists of cecum, large intestine and rectum. CECUM connects small and large intestines, while the large intestine absorbs water and salt of fission material before it is excreted as waste. The colon itselfO has four different parts: ascending large intestine, transverse large intestine, descending large intestine and sigmoid large intestine. The rectum is a temporary storage space for feces or solid waste before its excretion. The last part of the lower tract GI, rectum, is the output point of the feces, the waste product of the alimentary canal, from the body.

Liver, gallbladder and abdominal are some other digestive system organs that support the function of an alimentary channel. The liver produces bile, which helps in the break -up of ingestion in the small intestine, and the gallbladder temporarily stores the bile. The pancreas excludes several digestive enzymes of the Anti -intestine to help in digestion.