constructing BIA in an undergraduate physics laboratory gives students both conceptual and practical exposure to the importance of physics in medicine beyond a traditional physics laboratory. Conceptually, students are exposed to principles of RC circuits by connecting medical inquiry with the function of a common device. Students practice circuit analysis by relating body impedance to simple electrical components. Outcomes range from an increased understanding of concepts needed for a solid physics background for STEM majors to an integrated, real-world appreciation for the necessity of that understanding. In addition, RC circuits with ac signals, resistance, capacitance, impedance, frequency, electrical properties of biological tissue, and device construction are explained and practiced to varying degrees. The complexity of the BIA laboratory is at an introductory physics level but can be expanded to challenge those in upper division courses. This laboratory activity allows stu- dents to relate in a personal manner to an otherwise abstract concept.