End Zone: The scoring area of the football field. The end zone is bounded by the goal line, the end line, and the two sidelines.
Goal Post: The posts at the back ends of the end zone, through which a team can score field goals and extra points.
End Line: The line at the end of the end zone. The line itself is considered out of bounds.
Hash Marks: A series of markings perpendicular to the sideline. Each mark represents one yard. At the start of each play, the football is placed either on the hash marks or somewhere between the hash marks. If the last play ended with the ball between the hash marks, the ball will be placed where it was dead. If the last play ended with the ball between the hash mark and the sideline, the ball will be placed on the hash mark.
Sideline: The line to the side of the playing field and the end zone. The line itself is considered out of bounds.
Goal Line: The line that separates the End Zone and the field of play. A touchdown is scored when any part of the ball touches the imaginery vertical plane that extends from the goal line and the ball carrier is inbounds.