The circulatory system is the body’s roadway. It transports blood to deliver nutrients and oxygen throughout the body while sweeping away waste. 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.