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.
Read more about Head.
Famous quotes containing the word head:
“Men, my dear, are very queer animals, a mixture of horse- nervousness, ass-stubbornness, and camel-malice—with an angel bobbing about unexpectedly like the apple in the posset, and when they can do exactly as they please, they are very hard to drive.
Oh, England. Sick in head and sick in heart,
Sick in whole and every part,
And yet sicker thou art still
For thinking that thou art not ill.”
—Thomas Henry Anonymous (1825–95)
“I’m not even thinking straight any more. Numbers buzz in my head like wasps.”
—Kurt Neumann (1906–1958)
“No country is so peaceful as the one that leads into death. Life arches above one’s head like a bridgespan, and below it flows the water, carries the boat, takes it further.”
—Alfred Döblin (1878–1957)