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:
“Before marriage, a man will go home and lie awake all night thinking about something you said; after marriage, he’ll go to sleep before you finish saying it.”
—Helen Rowland (1875–1950)
“To die, to sleep—
No more, and by a sleep to say we end
The heartache and the thousand natural shocks
That flesh is heir to—’tis a consummation
Devoutly to be wished. To die, to sleep.
To sleep, perchance to dream. Ay, there’s the rub,
For in that sleep of death what dreams may come
When we have shuffled off this mortal coil
Must give us pause.”
—William Shakespeare (1564–1616)
“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)