Answer: (4)
The alimentary canal is mainly referred to as the pathway by which food enters our body and moves out through the anus during digestion. It is a tube-like structure which starts from the mouth and ends in the anus. The alimentary canal plays a primary role in the human digestion and is also termed as the digestive tract. The alimentary canal is about 30 feet long from the oesophagus to the anus.
