Top Ten Powerful Nations 2013 (According to Global Presence). Top Ten Powerful Countries Ranking (2012). NOTE: National Power Index (NPI) 2012 is a comprehensively revised version of the previous National Security Indexes published in Indiaâs National Security Annual Review (INSAR) series since 2002.op Ten Powerful Nations 2013 (According to Global Presence). Top Ten Powerful Countries Ranking (2012). NOTE: National Power Index (NPI) 2012 is a comprehensively revised version of the previous National Security Indexes published in Indiaâs National Security Annual Review (INSAR) series since 2002.
Overview. When you take in food, it's the job of your digestive tract to break that food down into smaller pieces through mechanical digestion, and then break larger molecules into smaller ones through chemical digestion.
Confidence votes 12. The reproductive system breaks down food and takes nutrients out of it so they can used by the body. The nutrients are transported throughout the body by the circulatory system. Digestion of large nutrients into smaller molecules takes place throughout the digestive system. Wherever there are enzymes secreted, you can be sure that the break down of substances is taking place. Specific organs where this takes place include the mouth, the stomach and the small intestine.