The official rule for men's field lacrosse calls for 10 players on each team - 3 Attackman, 3 Middies, 3 Defensemen and 1 Goalie - on the field or 20 total players.
men and women have the same number of rib bones, 7 true ribs, 5 false ribs, and 2 floating ribs that don't go all the way around and connect to the sternum.