Sleep is a naturally occurring state of mind described by altered consciousness, partially inhibited sensory activity, inhibition of nearly all voluntary muscles and a big part of our day. Most people spend one-third of their lives sleeping and still scientists don't fully understand why we need sleep although it is known to help our brains retain information better. Our bodies require long periods of sleep to restore and grow muscle, repair tissue, and synthesize hormones. This is why children grow more over the summer, they also have more time to relax and do not have the stresses of the school year. Many people do not receive the amount of sleep necessary and some even suffer from sleep disorders or parasomnias, such as sleep apnea, narcolepsy, and night terrors. These disorders often disrupt the sufferers sleep cycle, prevent sleep in general, or cause intense nightmares that prompt them to wake up. Besides being able to lay in bed for hours at a time and forget all your problems, sleep is actually very important for you health mentally and psychically. Sleep is involved in the healing of the heart and repair of its blood vessels, lack of sleep is also contributed to a large amount of health problems such as heart disease, kidney failure, stroke, high blood pressure, and diabetes. Without a proper sleeping schedule you might find it harder to pay attention in school or even on the road! Sleeping rests your exhausted brain to prepare it for the next day, a person’s brain that did not receive enough sleep will lose brain cells and not work to its full capacity.