Sleep is a naturally recurring state characterized by reduced or absent consciousness, relatively suspended sensory activity, and inactivity of nearly all voluntary muscles. It is distinguished from quiet wakefulness by a decreased ability to react to stimuli, but it is more easily reversible than hibernation or coma. Sleep is a heightened anabolic state, accentuating the growth and rejuvenation of the immune, nervous, skeletal and muscular systems. It is observed in all mammals, all birds, and many reptiles, amphibians, and fish.
The purposes and mechanisms of sleep are only partially clear and are the subject of intense research. Sleep is often thought to help conserve energy, but actually decreases metabolism only about 5–10%. Hibernating animals need to sleep despite the hypometabolism seen in hibernation, and in fact they must return from hypothermia to euthermy in order to sleep, making sleeping "energetically expensive.
Ratings and Reviews
I love it but it won't let me get the app again! I had to take it off to make space and I tried to download it again but it still isn't working!!! I WANT IT BAD AGAIN!!!
Ppl should get this even if there is just two songs its helpful and nice relaxing music rather than rock or something it calms you down and helps promote my sleep
Has interesting info and music, good price.
With Family Sharing set up, up to six family members can use this app.