How to determine the importance of sleep

Sleep is as important as the water we drink, the air we breathe and the food we eat to function and live at our best. Sleep is regulated by 2 body systems. Circadian biological clock regulates timing of sleep and wakefulness. This biological clock in the internal mechanism that regulates when we feel sleepy and when we feel alert. It resides in the brain and is affected by light and dark. We need sleep for functioning in a safe, efficient and effective way. We need it for cognitive, social and physical performance, emotional enhancement and relating well with others, learning and memory consolidation and prevention of health problems.