In Afghanistan, the US-led international force still occupies more than 450 bases. In total, the US military has some form of troop presence in approximately 150 foreign countries, not to mention 11 aircraft carrier task forcesâessentially floating basesâand a significant, and growing, military presence in space.
Metabolism is the set of chemical reactions that occur in living organisms in order to maintain life. These processes allow organisms to grow and reproduce, maintain their structures, and respond to their environments.
metabolism [(muh-tab-uh-liz-uhm)] The total of the chemical reactions that maintain the life of a living thing. Note: In humans, metabolism is related to the intake and use of food; persons with a high metabolism can eat more without gaining weight.