Use the Systems Guide during the placement activity of the Body System Battles. The guide outlines the ten body systems and their primary structures/organs.It explains the mnemonic associations next to the structure's name, and provide a brief list of functions at a basic (1) and more advanced (2) level.The guide includes the nervous, endocrine, respiratory, digestive, urinary, immune and lymphatic, integumentary, circulatory, muscular, and skeletal systems. The reproductive system is excluded.U