Online interactive quiz on the human digestive system. It features a human digestive system diagram labeled, diagram of digestive system of human body. This is a biology quiz for children in 2nd, 3rd, 4th, 5th and 6th grades. The digestive system has different parts, in this quiz kids have to find the different parts and match them to the labels on a diagram. After learning about the different parts, children can go ahead learning about some of their basic functions. Along with this The Digestive System Diagram For kids Quiz, print out the worksheet below for more practice.