Students work as a class in this fun classroom activity. Each person gets a sign with either a picture or a definition. They are asked to line themselves in order from mouth to anus. Afterwards, I typically ask each student to do a movement associated with the organ that they have or question them about the organ's properties. It's also fun to ask questions about what happens when there is a disease process involved. It can be modified for a big group or small group. In addition, it can be modified for age group by taking away some cards. Kids love the game.