Fnnythe3hd
Platinum
- Joined
- May 18, 2012
- Messages
- 1,495
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Sleep, what's that?
Sleep is a naturally recurring state characterized by reduced or absent concousness, relatively suspended sensory activity, and inactivity of nearly all voluntary muscles .It is distinguished from wakefulness by a decreased ability to react to stimuli, and is more easily reversible than being in hibernation or a coma. Sleep is a heightened anabolic state, accentuating the growth and rejuvenation of the immune, nervous, skeletal and muscular systems. It is observed in mammals, birds, reptiles, amphibians, and fish.