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.
At corner kicks, and at direct free kick, indirect free kick or throw-ins that are likely to become a cross, most teams use man-on-man marking, even those which otherwise play zone defence. Each player is given an opponent to mark, in advanced football they usually have been assigned an opponent before the match.