Which of the following body parts is not part of the digestive system?

The uterus is not part of the digestive system; rather, it is part of the reproductive system. The primary function of the uterus is to house and nourish developing embryos during pregnancy. In contrast, the other options listed – the stomach, intestines, and liver – are all integral components of the digestive system, which is responsible for breaking down food, absorbing nutrients, and eliminating waste. The stomach digests food; the intestines further break down and absorb nutrients; and the liver produces bile, which helps in the digestion of fats. Thus, identifying the uterus as the only option that does not belong to the digestive system is accurate.