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Punjab PMETPunjab PMET 2007Digestion and Absorption
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Digestion is the process by which the body breaks down food into absorbable nutrients. Proteins are the substance of the body, the actual building materials from which muscle, connective tissue, the skin, hair and other vital tissues are constructed. Chemical digestion of proteins starts in the stomach and is completed in the upper part of the small intestine, also called the duodenum. Protein digestion starts with stomach enzymes (proteases) such as pepsin that break apart specific links in the amino acids that comprise proteins. These chains are reduced to much shorter lengths. called peptides and peptones. The partially digested proteins move on to the small intestine where pancreatic proteases continues digestion, breaking the peptides and peptones into individual amino acids which are absorbed directly or attached (chelated) to minerals, thus allowing mineral absorption.