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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Some articles on head:
... a presidential 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 head of ... 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 ...
... A mace is a blunt weapon, a type of club or virge—that uses a heavy head on the end of a handle to deliver powerful blows ... often 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 ...
... 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 ...
More definitions of "head":
- (noun): The foam or froth that accumulates at the top when you pour an effervescent liquid into a container.
Example: "The beer had a large head of foam"
- (verb): Remove the head of.
Example: "Head the fish"
- (noun): A line of text serving to indicate what the passage below it is about.
Synonyms: heading, header
- (noun): An individual person.
Example: "Tickets are $5 per head"
- (noun): The rounded end of a bone that bits into a rounded cavity in another bone to form a joint.
Example: "The head of the humerus"
- (noun): That part of a skeletal muscle that is away from the bone that it moves.
- (noun): The source of water from which a stream arises.
Example: "They tracked him back toward the head of the stream"
Synonyms: fountainhead, headspring
- (noun): That which is responsible for one's thoughts and feelings; the seat of the faculty of reason.
Example: "I couldn't get his words out of my head"
Synonyms: mind, brain, psyche, nous
- (noun): The subject matter at issue.
Example: "Under the head of minor Roman poets"
- (noun): (grammar) the word in a grammatical constituent that plays the same grammatical role as the whole constituent.
Synonyms: head word
- (noun): A single domestic animal.
Example: "200 head of cattle"
- (verb): Be in the front of or on top of.
Example: "The list was headed by the name of the president"
- (noun): The upper part of the human body or the front part of the body in animals; contains the face and brains.
Example: "He stuck his head out the window"
- (noun): The front of a military formation or procession.
Example: "The head of the column advanced boldly"; "they were at the head of the attack"
- (noun): The pressure exerted by a fluid.
Example: "A head of steam"
- (verb): Take its rise.
Example: "These rivers head from a mountain range in the Himalayas"
- (verb): Direct the course; determine the direction of travelling.
Synonyms: steer, maneuver, manoeuver, manoeuvre, direct, point, guide, channelize, channelise
- (noun): The top of something.
Example: "The head of the stairs"; "the head of the page"; "the head of the list"
- (verb): Form a head or come or grow to a head.
Example: "The wheat headed early this year"
- (noun): A user of (usually soft) drugs.
Example: "The office was full of secret heads"
- (noun): (computer science) a tiny electromagnetic coil and metal pole used to write and read magnetic patterns on a disk.
Synonyms: read/write head
- (verb): Travel in front of; go in advance of others.
- (noun): The tip of an abscess (where the pus accumulates).
- (noun): The educator who has executive authority for a school.
Synonyms: principal, school principal, head teacher
- (noun): A projection out from one end.
Example: "The head of the nail", "a pinhead is the head of a pin"
- (noun): The part in the front or nearest the viewer.
Example: "He was at the head of the column"
- (noun): Forward movement.
- (noun): A membrane that is stretched taut over a drum.
- (noun): A V-shaped mark at one end of an arrow pointer.
- (noun): A person who is in charge.
Example: "The head of the whole operation"
Synonyms: chief, top dog
- (verb): Be the first or leading member of (a group) and excel.
Synonyms: head up
- (noun): The length or height based on the size of a human or animal head.
Example: "He is two heads taller than his little sister"; "his horse won by a head"
- (noun): (usually plural) an obverse side of a coin that bears the representation of a person's head.
Example: "Call heads or tails!"
- (verb): Be in charge of.
- (noun): The striking part of a tool.
Example: "The head of the hammer"
- (noun): A rounded compact mass.
Example: "The head of a comet"
- (verb): To go or travel towards.
Example: "Where is she heading"; "We were headed for the mountains"
- (noun): Oral-genital stimulation.
Example: "They say he gives good head"
Synonyms: oral sex
- (noun): (nautical) a toilet on board a boat or ship.
Famous quotes containing the word head:
“Heaping glowing coals on another persons head is usually misunderstood and comes to nothing because the other person knows just as well that he is in the right and has also given some thought on his own part to heaping coals.”
—Friedrich Nietzsche (18441900)
“It is easy to see that, even in the freedom of early youth, an American girl never quite loses control of herself; she enjoys all permitted pleasures without losing her head about any of them, and her reason never lets the reins go, though it may often seem to let them flap.”
—Alexis de Tocqueville (18051859)
“In the fell clutch of circumstance,
I have not winced nor cried aloud:
Under the bludgeonings of chance
My head is bloody, but unbowed.”
—W.E. (William Ernest)