Is the small intestine longest part of alimentary canal?

The small intestine is indeed the longest part of the alimentary canal, which begins at the mouth and includes the esophagus, stomach, small intestine, large intestine, and anus. The small intestine is responsible for the majority of nutrient absorption after the food has been partially broken down in the mouth and stomach. It is much longer than the other sections of the alimentary canal, allowing for more surface area for efficient absorption of nutrients.