The spleen is an organ in the upper left abdomen, which filters blood, disposes of worn-out red blood cells, and provides a 'reserve supply' of blood. It contains both red tissue, and white lymphatic tissue. The major (encapsulated) lymphatic organs are the lymph nodes, thymus and spleen.
Place the brined corned beef in a large pot or Dutch oven along with the liquid and spices that accompanied it in the package. Pour in enough water to cover the beef, then bring the water to a boil on the stovetop. Reduce the heat to a simmer, and cover the pot. A three-pound corned beef could take three hours or more to become perfectly tender. Check the meat occasionally, adding more water if necessary. The beef is ready when it pulls apart easily.
Cooking times for beef are to medium doneness unless otherwise noted. Let roasts, larger cuts of meat, and thick steaks rest 10 to 15 minutes before carving. The internal temperature of the meat will rise by 5 to 10 degrees during this time. Cut of Meat. Thickness or Weight.