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.
Metabolic enzymes operate in the body's cells and blood. Metabolism is a general term for the biochemical processes through which the body changes air, food and other materials into the substances it needs to function properly.