Teach your students about the systems of the human, the function of organ systems, and how they compare the the organs of other plants and animals. This is a complete unit, including a 12-page informational text, teaching notes with 14 lesson plans, pieces for the lapbook, a unit test, quizzes and crossword puzzles for each organ system, and a 139-slide PowerPoint! The unit includes learning activities for your students to observe how muscles contract and relax using a model, make a working mode