This activity is a review of each of the body systems. For the first part of the activity students use clues about the structures and functions to figure out the systems. For the second part, students use case studies of various illnesses to figure out what body systems are impacted. For example, they look at heat stroke and food poisoning to connect the symptoms back to body systems. There are some video clips included to make this activity a full class period. Perfect for sub plans or a day for students to make real world connections to the systems of the body.