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:
“Down the chimney St. Nicholas came with a bound.
He was dressed all in fur, from his head to his foot,
And his clothes were all tarnished with ashes and soot;”
—Clement Clarke Moore (1779–1863)
“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)
“Who can speak broader than he that has no house to put his head in? Such may rail against great buildings.”
—William Shakespeare (1564–1616)