Muscle wasting, also called muscle atrophy, is the weakening or loss of muscle tissue. Muscle wasting causes a significant decrease in muscle strength and the ability to move the muscle, according to MedlinePlus. In a healthy individual, muscle wasting can occur as result of the lack of physical exercise.
Primary Storage Device. Alternatively referred to as internal memory, main memory, and primary memory, a primary storage device is a medium that holds memory for short periods of time while a computer is running.
Secondary Storage. The disk drives in the computer are the most common form of secondary storage. The disk drive is nonvolatile and retains the information written to it after the power is turned off to the computer. Because it is a mechanical device, the disk drive is much slower than primary storage devices. All nonvolatile storage devices fall into the secondary storage class, including optical and tape drives.