However, that particular doctor, the family physician, represents only one of the countless areas in which medical professionals work. In fact, there is a specific type of doctor for almost every major system located in the human body. Listed below are just thirty of the dozens of examples:
A knockout (abbreviated to KO or K.O.) is a fight-ending, winning criterion in several full-contact combat sports, such as boxing, kickboxing, muay thai, mixed martial arts, karate, some forms of taekwondo and other sports involving striking.
A knockout mouse or knock-out mouse is a genetically modified mouse (Mus musculus) which researchers have inactivated, or knocked out, an existing gene by replacing it or disrupting it with an artificial piece of DNA.hile knockout mouse technology represents a valuable research tool, some important limitations exist. About 15 percent of gene knockouts are developmentally lethal, which means that the genetically altered embryos cannot grow into adult mice.