Sleep

by **Nikshay_** Sat Mar 29, 2008 3:33 am

Sleep is a normal activity of most oragnisms. Every human being,on an average,spends a third of his/her life sleeping.
Babies and children spend more time than adults and old people are found sleep less.
The sleep-wake cycle is controlled by an internal biological clock which usually coincides with the day-night cycle
Sleep does wonders to our body. We feel refreshed after a good night's sleep. But prolonged lack of sleep leads to irritability, lack of concentration and even hallucination.
Thus sleep certainly has a restorative function as our muscles and the different parts of the body rest and relax. This in turn,helps the body to face another active day