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:
“Standing on the bare ground,—my head bathed by the blithe air, and uplifted into infinite space,—all mean egotism vanishes. I become a transparent eye-ball; I am nothing; I see all; the currents of the Universal Being circulate through me; I am part and particle of God.”
—Ralph Waldo Emerson (1803–1882)
“If thou dost slander her and torture me,
Never pray more; abandon all remorse;
On horror’s head horrors accumulate;
Do deeds to make heaven weep, all earth amazed;
For nothing canst thou to damnation add
Greater than that.”
—William Shakespeare (1564–1616)
“A man of sense and energy, the late head of the Farm School in Boston Harbor, said to me, “I want none of your good boys,Mgive me the bad ones.” And this is the reason, I suppose, why, as soon as the children are good, the mothers are scared, and think they are going to die.”
—Ralph Waldo Emerson (1803–1882)