In this unit, students investigate the human body systems that work to obtain, distribute, or process the body’s primary resources for energy and power—food, oxygen, and water. Students make a working model of the digestive system and design experiments to test the optimal conditions for chemical digestion. Students use probes and data acquisition software to monitor their own lung function and oxygen intake. Students investigate the anatomy and physiology of the urinary system and a simulated urinalysis to identify health conditions and diagnosis disease.