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:
“Ask anyone committed to Marxist analysis how many angels on the head of a pin, and you will be asked in return to never mind the angels, tell me who controls the production of pins.”
—Joan Didion (b. 1934)
“Come, Kate, thou art perfect in lying down.
Come, quick, quick, that I may lay my head in thy lap.”
—William Shakespeare (1564–1616)
“The right moment wears a full head of hair: when it has been missed, you can’t get it back; it’s bald in the back of the head and never turns around.”
—François Rabelais (1494–1553)