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:
“So long as you write what you wish to write, that is all that matters; and whether it matters for ages or only for hours, nobody can say. But to sacrifice a hair of the head of your vision, a shade of its colour, in deference to some Headmaster with a silver pot in his hand or to some professor with a measuring-rod up his sleeve, is the most abject treachery, and the sacrifice or wealth and chastity, which used to be said to be the greatest of human disasters, a mere flea-bite in comparison.”
—Virginia Woolf (1882–1941)
“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)
“Being wakeful for her sake,
Remembering what she had,
What eagle look still shows,
While up from my heart’s root
So great a sweetness flows
I shake from head to foot.”
—William Butler Yeats (1865–1939)