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:
“The Temptress has now been shown here—terrible. The story, Garbo, everything is extremely bad. It is no exaggeration to say that I was dreadful. I was tired, I couldn’t sleep and everything went wrong. But the main reason is, I suppose, that I’m no actress.”
—Greta Garbo (1905–1990)
“The city sleeps and the country sleeps,
The living sleep for their time, the dead sleep for their time,
The old husband sleeps by his wife and the young husband sleeps by his wife;
And these tend inward to me, and I tend outward to them,
And such as it is to be of these more or less I am,
And of these one and all I weave the song of myself.”
—Walt Whitman (1819–1892)
“Pollicle dogs and cats all must
Jellicle cats and dogs all must
Like undertakers, come to dust.
Here a little dog I pause
Heaving up my prior paws,
Pause, and sleep endlessly.”
—T.S. (Thomas Stearns)