In this "gross" activity (on pages 34-46), learners make a life-size model of a human digestive tract, and follow the life of a beef tapeworm as it makes its way through. In Part One, learners color, cut out, and assemble the parts of the digestive system, including full-length small and large intestines. In Part Two, learners cut out pictures of the stages of tapeworm development, and tape them within the model. A beef tapeworm life cycle diagram helps put the human host period within a larger system.