Rectangular surface (53.3 x 120 yards) covered with natural or synthetic grass on which a football game is played; a game consists of four 15-minute quarters.
The solid lines at five-yard intervals that mark the distance from the goal line; at the start of a game, the ball is kicked off from the thirty-yard line.
The broken lines marking off yards; the lines and inbounds lines mark the line of scrimmage when play resumes.
Line marking the far extremity of the end zone; the white area behind the goal is not part of the playing field.
Zone in which a touchdown (six points) is scored when a player crosses it in possession of the ball.
Line marking the start of the end zone.
Line dividing the field into two zones, one for each team; it is 50 yards from the goal lines.
Line demarcating the sides of the playing field; the play is whistled dead when the ball or a player in possession of the ball crosses it.
Official responsible for applying the rules; this individual ensures that the game is properly played and supervises the work of the other officials.
Official whose main role is to signal when a player crosses the sideline in possession of the ball.
Official in charge of checking player equipment and signaling infractions near the line of scrimmage.
Official who signals stoppages in play and indicates exactly where to position the ball after it leaves the field of play.
Official who tracks the number of players on defense, follows the receivers and monitors the time elapsed between plays.
Official whose role includes timekeeping, signaling stoppages in play and officiating during kickoffs and punts.
Area for substitute players and coaches; a team’s players are divided into three units: offense, defense and special teams.