<Ul> <Li> Proteins are degraded into small peptides and amino acids before absorption . Chemical breakdown begins in the stomach and continues in the small intestine . Proteolytic enzymes, including trypsin and chymotrypsin, are secreted by the pancreas and cleave proteins into smaller peptides . Carboxypeptidase, which is a pancreatic brush border enzyme, splits one amino acid at a time . Aminopeptidase and dipeptidase free the end amino acid products . </Li> <Li> Lipids (fats) are degraded into fatty acids and glycerol . Pancreatic lipase breaks down triglycerides into free fatty acids and monoglycerides . Pancreatic lipase works with the help of the salts from the bile secreted by the liver and stored in the gall bladder . Bile salts attach to triglycerides to help emulsify them, which aids access by pancreatic lipase . This occurs because the lipase is water - soluble but the fatty triglycerides are hydrophobic and tend to orient towards each other and away from the watery intestinal surroundings . The bile salts emulsify the triglycerides in the watery surroundings until the lipase can break them into the smaller components that are able to enter the villi for absorption . </Li> <Li> Some carbohydrates are degraded into simple sugars, or monosaccharides (e.g., glucose). Pancreatic amylase breaks down some carbohydrates (notably starch) into oligosaccharides . Other carbohydrates pass undigested into the large intestine and further handling by intestinal bacteria . Brush border enzymes take over from there . The most important brush border enzymes are dextrinase and glucoamylase, which further break down oligosaccharides . Other brush border enzymes are maltase, sucrase and lactase . Lactase is absent in some adult humans and, for them, lactose, like most poly - saccharides, is not digested in the small intestine . Some carbohydrates, such as cellulose, are not digested at all, despite being made of multiple glucose units . This is because the cellulose is made out of beta - glucose, making the inter-monosaccharidal bindings different from the ones present in starch, which consists of alpha - glucose . Humans lack the enzyme for splitting the beta - glucose - bonds, something reserved for herbivores and bacteria from the large intestine . </Li> </Ul> <Li> Proteins are degraded into small peptides and amino acids before absorption . Chemical breakdown begins in the stomach and continues in the small intestine . Proteolytic enzymes, including trypsin and chymotrypsin, are secreted by the pancreas and cleave proteins into smaller peptides . Carboxypeptidase, which is a pancreatic brush border enzyme, splits one amino acid at a time . Aminopeptidase and dipeptidase free the end amino acid products . </Li> <Li> Lipids (fats) are degraded into fatty acids and glycerol . Pancreatic lipase breaks down triglycerides into free fatty acids and monoglycerides . Pancreatic lipase works with the help of the salts from the bile secreted by the liver and stored in the gall bladder . Bile salts attach to triglycerides to help emulsify them, which aids access by pancreatic lipase . This occurs because the lipase is water - soluble but the fatty triglycerides are hydrophobic and tend to orient towards each other and away from the watery intestinal surroundings . The bile salts emulsify the triglycerides in the watery surroundings until the lipase can break them into the smaller components that are able to enter the villi for absorption . </Li> <Li> Some carbohydrates are degraded into simple sugars, or monosaccharides (e.g., glucose). Pancreatic amylase breaks down some carbohydrates (notably starch) into oligosaccharides . Other carbohydrates pass undigested into the large intestine and further handling by intestinal bacteria . Brush border enzymes take over from there . The most important brush border enzymes are dextrinase and glucoamylase, which further break down oligosaccharides . Other brush border enzymes are maltase, sucrase and lactase . Lactase is absent in some adult humans and, for them, lactose, like most poly - saccharides, is not digested in the small intestine . Some carbohydrates, such as cellulose, are not digested at all, despite being made of multiple glucose units . This is because the cellulose is made out of beta - glucose, making the inter-monosaccharidal bindings different from the ones present in starch, which consists of alpha - glucose . Humans lack the enzyme for splitting the beta - glucose - bonds, something reserved for herbivores and bacteria from the large intestine . </Li>

What is the length of your large and small intestine