Final answer:
In a cadaver, the digestive system is longer than in a living person because there is no muscle tone.
Step-by-step explanation:
The digestive system in a cadaver is longer than in a living person because in a cadaver, there is NO muscle tone. Muscle tone is the continuous low-level contraction of the smooth muscles in the walls of the digestive tract that helps move food along the alimentary canal through peristalsis. In a living person, muscle tone ensures efficient movement of food through the digestive system, while in a cadaver, the lack of muscle tone leads to a longer digestive system.