Human Body Systems
Passage
The human body is made up of several interconnected systems that work together to maintain life. The circulatory system transports blood, oxygen, and nutrients; the respiratory system enables breathing and oxygen exchange. The nervous system controls bodily functions and responses, while the digestive system breaks down food into usable energy. The skeletal system provides structure, and the muscular system allows movement. Each system plays a crucial role?without one, the body cannot function properly. These systems are studied in biology and medicine to understand health, disease, and the amazing complexity of life.
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