Barr body. Definition. noun. The small, dark-staining mass of inactive X chromosome within the nucleus of non-dividing cell. Supplement. Barr bodies are previously used as the basis for sex determination especially during the Olympics (see Barr test). Word origin: named after its discoverer Murray Llewellyn Barr, a Canadian anatomist who first identified the particle in the nucleus of neurons of female cats. Synonym: sex chromatin.
As of September 2011, there are nine Unified Combatant Commands as specified in Title 10 and the latest annual UCP. Six have regional responsibilities, and three have functional responsibilities.
The United States Central Command is a theater-level Unified Combatant Command of the U.S. Department of Defense. It was established in 1983, taking over the 1980 Rapid Deployment Joint Task Force responsibilities. The CENTCOM Area of Responsibility includes countries in the Middle East, parts of northern Africa, and Central Asia, most notably Afghanistan and Iraq. CENTCOM has been the main American presence in many military operations, including the Persian Gulf War, the War in Afghanistan, and