In the sentence "When comparing the large and small intestine, we can conclude that __________" the conclusion that correctly completes the sentence is C. The small intestine is longer, but the large intestine is thicker. The large intestine is called large not because of its length but because of its width. The large intestine is thicker than the small intestine. On the contrary, the small intestine is longer than the large intestine. The length of the small intestine is 7 meters and the length of the large intestine is 1.5 meters. Thus, the small intestine is longer, but the large intestine is thicker.