10 Flexible, body-wearable electronic devices for measuring physiological parameters for medical and therapeutic purposes, namely, for measuring electrical activity of the heart, electrical activity along the scalp, electrical activity produced by skeletal muscles, body temperature, heart rate, range of motion, hydration, blood sugar, oxygenation, biological fluid, vapor composition, pulse, microfluidics, and blood chemistry; Rigid Body-wearable electronic devices for measuring physiological parameters for medical and therapeutic purposes, namely, for measuring electrical activity of the heart, electrical activity along the scalp, electrical activity produced by skeletal muscles, body temperature, heart rate, range of motion, hydration, blood sugar, oxygenation, biological fluid, vapor composition, pulse, microfluidics, and blood chemistry