As populations grow older and the number of 1 _______ people rises, healthcare is becoming increasingly expensive and complicated. Elderly people naturally 2 __________ more health problems and may need a variety of 3 _________. One solution is 4 ________ technology—small, light devices that people can carry with them. By measuring a person’s heart rate, for example, these devices can 5 _______ a person’s health. This information can help the 6 ________, nurse, or doctor take care of patients better.