The prostate is a small gland located just below the bladder. The gland is only found in men. It is shaped like a doughnut and surrounds the urethra, the tube through which urine flows. The prostate reaches its adult size by the age of 20 and weighs a little less than one ounce.
Zonal marking Zonal marking is a defensive strategy where defenders cover an area of the pitch rather than marking a specific opponent. If an opponent moves into the area a defender is covering, the defender marks the opponent.
  A kick-off is used to put the ball into play from the center mark at the start of each half, after a goal has been scored and at the start of overtime periods.ll players must be on their own half of the field. The ball is placed on the center mark. All players on the non-kicking team must be at least 10 yards from the ball.