Strike zones are areas in which a batter must defend against a pitch. They are typically divided into three sections: the inner, middle, and outer zones. The inner zone is the area closest to the batter's body, the middle zone is the area between the inner and outer zones, and the outer zone is the area furthest from the batter's body. Veins, lanes, and alleys are all terms used to describe the strike zones. Veins refer to the inner zone, lanes refer to the middle zone, and alleys refer to the outer zone.