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:
“Impoliteness is frequently the sign of an awkward modesty that loses its head when surprised and hopes to conceal this with rudeness.”
—Friedrich Nietzsche (1844–1900)
“The hedge-sparrow fed the cuckoo so long
That it had its head bit off by its young.”
—William Shakespeare (1564–1616)
“Our minds can go no further. The human imagination is capable of no further expression of beauty than the carved owl of Athene, the archaic, marble serpent, the arrogant selfish head of the Acropolis Apollo.”
—Hilda Doolittle (1886–1961)