[the_ad id="3627"] Sleep is most important thing by which our muscles get rest. Our nervous systems and hormones function works properly. Our heart beats 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 sleep for enough hours then it increases our skin beauty. [the_ad id="3627"] Why we need Sleep? Now a days due to more responsibility at home and job schedule we always get tired. Our mind and body get tired. So by sleeping we can over come our stress. We must have 6 to 8 hours of sleep every night to take full body rest. 6 to 8 hours is called healthy sleep hours for human.