Do you need an engaging, no-prep lesson covering the muscular system for middle school or 9th grade Health or Life Science students? This lesson contains both digital and print resources that cover the functions of the muscular system and the main skeletal muscle structures. The teacher tips outline how to really engage the students by assisting them to find the specific muscles on their own bodies and check how the many muscle pairs help the students to grasp how these pairs help them to go abo