Question

Which part of the digestive canals is involved in the completion of the digestion of food?

Answer 1

The human digestive system begins from the mouth and ends at the anus. In addition, there are major hormones and enzymes secreted for the digestion of food that occurs in every part of the alimentary canal.

Complete answer: The human digestive system also called the alimentary canal or gastrointestinal canal comprises the following organs: mouth, esophagus, pharynx, stomach, small intestine, large intestine, anus, and accessory organs. The mouth is the part of the alimentary canal where the bolus of food is ingested, crushed, and chewed with the help of teeth and tongue. Breakdown of carbohydrates takes place in the mouth. The pharynx is part of both the respiratory system and the digestive system. Its role is to conduct food to the esophagus. The Oesophagus is a muscular tube that runs from the pharynx to the stomach and is also called a food pipe. The food is conducted to the stomach via the oesophagus by a process called peristalsis. The stomach is a J-shaped organ with an oesophagus located above it and a duodenum located at the lower end. Here the churning of food takes place. Digestion of protein takes place in the stomach.
-Small intestine: The food received from the stomach is partially digested and is in a semi-liquid form known as chyme. The small intestine is further divided into 3 parts: duodenum, jejunum, and ileum. The remaining waste exhausted of nutrients is converted into semi-solids known as feces. -Large intestine: here the absorption of remaining minerals and water takes place, and the feces is pushed into the rectum by the peristalsis movement and is finally expelled through the anus.
-The small intestine is the part that plays a major role in the digestion of food. It receives bile and pancreatic juices which aid in the process of digestion. Here the food is completely digested, and absorption of nutrients, sugars, amino acids, and fatty acids takes place. 90% of the digestion process is completed in the small intestine.

So, the small intestine is the part of the digestive system where the food is completely digested.

Note: Other than digestive organs accessory organs also play a vital role in the digestion of food. Accessory organs are as follows: tongue, salivary gland, pancreas, liver, and gallbladder. These organs secrete digestive juices and enzymes which are necessary for the digestion of food. Saliva, amylase, and lipase are secreted by the salivary gland. Bile is produced by the liver and the pancreas secretes pancreatic juices.