Choose the statement that best describes the alimentary canal.

The alimentary canal is also known as the digestive tract or digestive system. It is a long tube that runs from the mouth to the anus. The purpose of the alimentary canal is to break down food into nutrients that can be absorbed by the body.

The different parts of the alimentary canal have different functions. The mouth is where food is chewed and mixed with saliva. The pharynx is a muscular tube that connects the mouth to the esophagus. The esophagus is a muscular tube that carries food from the pharynx to the stomach. The stomach is a muscular sac that churns and mixes food with gastric juices. The small intestine is where most of the digestion and absorption of nutrients takes place. The large intestine is where water is absorbed from the remaining food matter. The rectum is the last part of the large intestine, where stool is stored before being eliminated from the body through the anus.

The alimentary canal is lined with a mucous membrane that helps protect the tissues from the harsh acids and enzymes that are produced during digestion. The mucous membrane also contains tiny villi, which are finger-like projections that increase the surface area of the lining and help with the absorption of nutrients.

The alimentary canal is a complex system that is essential for the survival of the human body. It is constantly working to break down food, absorb nutrients, and eliminate waste.