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.
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Famous quotes containing the word sleep:
“How gladly would I meet,
Mortality, my sentence, and be earth
Insensible! how glad would lay me down,
As in my mother’s lap! There I should rest,
And sleep secure.”
—John Milton (1608–1674)
“smashing the windows of sleep and dream
smashing the windows of history
a whiteness scattering
in hailstones
each a mirror
for man’s eyes.”
—Denise Levertov (b. 1923)
“The issue is privacy. Why is the decision by a woman to sleep with a man she has just met in a bar a private one, and the decision to sleep with the same man for $100 subject to criminal penalties?”
—Anna Quindlen (b. 1952)