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: Human Head
Other articles related to "head":
... Three stars compose a small triangle which mark the head ... The apex is marked by Meissa (Lambda Orionis), a hot blue giant of spectral type O8 III and apparent magnitude 3.54 which lies some 1100 light years distant ...
... blunt weapon, a type of club or virge—that uses a heavy head on the end of a handle to deliver powerful blows ... reinforced with metal, featuring a head made of stone, copper, bronze, iron, or steel ... The head of a military mace can be shaped with flanges or knobs to allow greater penetration of plate armour ...
... Manfred Hugo is the full-time Landrat (head of the district authority) since the 1st of July, 2002 ... From 1993 until June, 2002 he was the honorary head of the district authority ...
... representative democratic republic, where the President of Yemen is the head of state, while the Prime Minister of Yemen (who is appointed by the President) is ... The president is head of state, and the prime minister is head of government ...
... Head injury refers to trauma of the head ... However, the terms traumatic brain injury and head injury are often used interchangeably in medical literature ... The incidence (number of new cases) of head injury is 300 of every 100,000 per year (0.3% of the population), with a mortality rate of 25 per 100,000 in North America and 9 per 100,000 in Britain ...
Famous quotes containing the word head:
“I marvel thy master hath not eaten thee for a word, for thou art not so long by the head as honorificabilitudinitatibus.”
—William Shakespeare (15641616)
“Thus do I want man and woman to be: the one fit to wage war and the other fit to give birth, but both fit to dance with head and feet.”
—Friedrich Nietzsche (18441900)
“And Death fell with me, like a deepening moan.
And He, picking a manner of worm, which half had hid
Its bruises in the earth, but crawled no further,
Showed me its feet, the feet of many men,
And the fresh-severed head of it, my head.”
—Wilfred Owen (18931918)