Digestive glands in man: 1. Salivary Glands: There are three pairs of salivary glands found in human: � parotid � submaxillary and � sublingual glands. An alkaline fluid is secreted by these glands. It contains water ptyalin, ? - amylase, lysozyme, mucous, sodium chloride, potassium, bicarbonates etc. The ptyalin present in saliva is a digestive enzyme which acts on starch of food. It makes food wet. Lysozyme kills the bacteria. 2. Liver: Liver is the largest gland of body. It is situated in the right upper side of the abdominal cavity just below the diaphragm. It is bilobed and the right lobe, is much bigger than the left lobe. There is an oval blue coloured sac like structure, attached to the lower surface of the right lobe, through mesentery. This sac is called gall bladder. The bile juice secreted by liver is stored in gall bladder. Which helps in digestion. 3. Pancreas: Pancreas is second largest gland of the body. It is irregular shaped leaf like, pinkish- coloured gland which situated between �U� part of duodenum, attached by mesentery. It secretes pancreatic juice mainly. Many islets of Langerhans are found in interstitial tissue at many places in pancreas. These islets have ? - cell, � - cell and ? - cells. These cells secrete glucagon, insulin and somatostatin hormones respectively.