The muscular system keeps us on the move. Whether chasing a soccer ball, playing video games, or even just breathing, every movement we make relies on muscles. Explore more about this important body system with content tied to the curriculum of upper-elementary and middle school students and easy-to-understand text written at a 3rd grade reading level. Dyslexia-friendly font and design make learning accessible, while a recap at the end promotes checking for understanding to aid in comprehension. It's key biology curriculum made approachable for all.