Any of the otehr cooks/chefs might correct me on this but as far as I know, ALL meat has blood in it, technically, you're not cooking the blood out, what you are doing is changing the nature of the proteins, binding them tighter, cooking the water out, and breaking down collagen.
Extremely raw meat is very tough because of the collagen and muscle fibers, extremely well done meat is tough because the proteins are wound as tight as they can be, you still have collagen, and you've forced all the moisture OUT of the meat because the protein has actually sort of "clenched" up ... its why you have to allow meat to rest after cooking.