Which of the following is NOT an organ of the digestive system?

The urethra is not an organ of the digestive system; it is part of the urinary system. Its primary function is to transport urine from the bladder to the outside of the body. In contrast, the pancreas, pharynx, and liver all play essential roles in digestion.

The pancreas produces digestive enzymes that help break down carbohydrates, proteins, and fats. The pharynx acts as a pathway for food, leading to the esophagus and plays a crucial role in swallowing. The liver produces bile, which is vital for the digestion and absorption of fats. Understanding these functions helps clarify why the urethra is not involved in the digestive process.