How long is elementary canal of digestive system?

There is no such term called "elementary canal" in the context of the digestive system. The digestive system consists of several organs that work together to break down food and absorb nutrients. The main components of the digestive system are the mouth, esophagus, stomach, small intestine, and large intestine. The total length of the digestive tract varies from person to person, but on average, it is about 30 feet (9 meters) long.