Sleep
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, 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 all mammals, all birds, and many reptiles, amphibians, and fish.
Read more about Sleep.
Famous quotes containing the word sleep:
“There is immunity in reading, immunity in formal society, in office routine, in the company of old friends and in the giving of officious help to strangers, but there is no sanctuary in one bed from the memory of another. The past with its anguish will break through every defence-line of custom and habit; we must sleep and therefore we must dream.”
—Cyril Connolly (1903–1974)
“I’m a lumberjack
And I’m OK,
I sleep all night
And I work all day.”
—Monty Python’s Flying Circus. broadcast Dec. 1969. Monty Python’s Flying Circus (TV series)
“And we, barely recalled from sleep there, sense
Arrivals lowing in a doleful distance
Horny dilemmas at the gate once more.
Come and choose wrong, they cry, come and choose wrong....”
—Philip Larkin (1922–1986)