Role and function of the large intestine - the function of the large intestine is to filter unabsorbed material (undigested food residues, excess digestive juices, cells rubbed off the intestinal mucosa, dead bacteria, small amounts of proteins and fats) and to eliminate waste products.
On an average diet, about 75-170 g of faeces are passed every day. A Large intestineits rich bacterial flora can produce vitamin K, break down cellulose and decompose protein in alkaline conditions. A Large intestinethe myriad bacteria living in the tank continue to digest certain substances, producing gas.