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.
Digestive enzymes in the small intestine include: trypsin for breaking down protein; pancreatic lipase to break down fat; and, pancreatic amylase to break down carbohydrates. Bile from the gallbladder also aids in the digestion and absorption of fats in the small intestine. The small intestine is responsible for most chemical digestion of food, and absorption of nutrients including proteins, fats, and carbohydrates.