The A blood type has only the A antigen and the B blood type has only the B antigen. The AB blood type has both A and B antigens, and the O blood type has neither A nor B antigen. By the time you are six months old, you naturally develop antibodies against the antigens your red blood cells lack.
Spain's football league is extremely competive and features many of the world's best players. While Real Madrid and FC Barcelona have run the show for much of La Liga's history, in recent years they have been met with top-notch competition from teams such as the Deportivo de La CoruÃ±a and Valencia CF. La Liga: Season-long tournament between the teams of Spain's top football division.
The Amateur Champions 1902-03 to 1942-43. The game of football was introduced in Mexico by the English workers at the mines and the railroads. The first championship was organized in 1902 in Mexico City with five teams: British Club, Mexico Cricket Club, Orizaba Charleston, Pachuca and Reforma Club. This was the seed of what later became the Primera Fuerza. This league was based mainly in Mexico City.