Question

What is the largest organ in the digestive system?

Answer 1

The digestive tract or the alimentary canal, is a long, continuous tube extending from the mouth to the anus, including the mouth, throat, esophagus, stomach, small intestine, and large intestine. The tongue and teeth are auxiliary structures in the mouth. Salivary glands, liver, gallbladder and pancreas are the most important auxiliary organs involved in digestion. These organs release fluids into the digestive tract.

Complete answer:
This question is really interesting because reading it quickly may lead to missing out on the right answer.
The largest organ and the longest organ are two different things. In the digestive system liver is the largest organ while intestine is the longest organ.
So, as per our question, liver is our answer.
Liver is located in the right-hand side of the abdominal cavity and is an accessory organ of the digestive system. It is also the human body's second-largest organ. It secretes bile which is an important secretion for the digestion of fats.

Additional information:
The digestive system includes the digestive tract and its auxiliary organs, which convert food into molecules that can be absorbed and used by human cells. Food gradually breaks down until the molecules are small enough to be absorbed and remove waste

Note:
Liver is a dark reddish brown cone shaped organ that has a weight of about 3 pounds. The liver is an important organ of the body, performing more than $500$ important functions, including removing waste and foreign bodies from the blood, regulating blood sugar levels, and producing important amino acids. Liver also removes toxic products like bilirubin and biliverdin.