Head
In anatomy, the head of an animal is the rostral part (from anatomical position) that usually comprises the brain, eyes, ears, nose and mouth (all of which aid in various sensory functions, such as sight, hearing, smell, and taste). Some very simple animals may not have a head, but many bilaterally symmetric forms do. Heads develop in animals by an evolutionary trend known as cephalization. In bilaterally symmetrical animals, nerve tissues concentrate at the anterior region, forming structures responsible for information processing. Through biological evolution, sense organs and feeding structures also concentrate into the anterior region, which collectively form the head.
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Famous quotes containing the word head:
“Now listen, buddy, there are a few corny ideas you got to get out of your head if you’re going to fly an airplane. Most things are just the reverse from what people think. The higher you are the safer you are. The Earth down there, that, that’s your enemy because once you hit that, boy, you splatter.”
—Dalton Trumbo (1905–1976)
“Thy hatred for this misery befallen;
On me already lost, me than thyself
More miserable. Both have sinned, but thou
Against God only; I against God and thee,
And to the place of judgment will return,
There with my cries importune Heaven, that all
The sentence, from thy head removed, may light
On me, sole cause to thee of all this woe,
Me, me only, just object of his ire.””
—John Milton (1608–1674)
“What lips my lips have kissed, and where, and why,
I have forgotten, and what arms have lain
Under my head till morning; out the rain
Is full of ghosts tonight,”
—Edna St. Vincent Millay (1892–1950)