Sleep is the most important thing by which our muscles get rest. Our nervous systems and hormones function work properly. Our heartbeats and breath rate also get down. Benefits of Sleep- According to several studies, it is most essential for a healthy immune system. Due to this, it declines in blood pressure. If we get to nights of sleeps for enough hours then it increases our skin beauty. Why do we need Sleep? Nowadays due to more responsibility at home and the job schedule, we always get tired. Our minds and body get tired. So by sleeping we can overcome our stress. We must have 6 to 8 hours of periods of sleeps every night to take full body rest. 6 to 8 hours is called healthy sleeps-hours for humans.