American football

American football, known in the United States as football, is a sport played between two teams of eleven. The objective of the game is to score points by advancing the ball into the opposing team's end zone. The ball can be advanced by running with it or throwing it to a teammate. Points can be scored by carrying the ball over the opponent's goal line, catching a pass thrown over that goal line, kicking the ball through the opponent's goal posts or tackling an opposing ball carrier in his own end zone.
American football is closely related to Canadian football but with some differences in rules and in the configuration of the field, [1] in particular the presence of eleven players on the field rather than twelve and the allowance of four downs per possession rather than just three. The larger number of downs results in more offensive rushing in American football than in the Canadian game.
In the United States, the major forms are high school football, college football and professional football, which are essentially similar but feature slightly different rules.[2]
High school football is governed in the U.S. by the National Federation of State High School Associations. College football is governed in the U.S. by two bodies: the National Collegiate Athletic Association and the National Association of Intercollegiate Athletics. The major league for professional football is the National Football League. Over the years, there have been other notable professional football leagues, including the All America Football Conference during the 1940s, the American Football League during the 1960s, the United States Football League during the 1980s, and the currently active United Football League.
The sport is also played outside the United States. National and collegiate leagues exist in the United Kingdom, Germany, Italy,[3] Switzerland,[4] Finland, Sweden,[5] Japan, Mexico, Israel,[6] Spain, Austria,[7] and several other European, American, Asian and Pacific Island nations.[8] The International Federation of American Football acts as an international governing body for the sport on five continents, but the organization has little standing in the United States compared to the aforementioned bodie



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