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:
“Still on Israel’s head forlorn,
Every nation heaps its scorn.”
—Emma Lazarus (1849–1887)
“I have in my head a whole army of people pleading to be let out and awaiting my commands.”
—Anton Pavlovich Chekhov (1860–1904)
“Between my head and my hand, there is always the face of death.”
—Francis Picabia (1878–1953)