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:
“Around, the night drops swiftly down
Its veils; does not condemn
Or praise the different actions done.
The hour that strikes across the town
Caresses all and injures none
As sleep approaches them.”
—Philip Larkin (1922–1986)
“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)
“Bring me my Bow of burning gold:
Bring me my Arrows of desire:
Bring me my Spear: O clouds unfold!
Bring me my Chariot of fire!
I will not cease from Mental Fight,
Nor shall my Sword sleep in my hand,
Till we have built Jerusalem
In England’s green & pleasant Land.”
—William Blake (1757–1827)