What is absorbed are molecules such as caffeine, alcohol and aspirin and other molecules. Now, if we examine the walls of our stomach the walls of the stomach contain a lining that contains millions of exocrine glands and two types of exocrine glands found in the stomach lining are gastric glands as well as pylori glands. Now, an exocrine gland is a gland that produces a molecule or a substance and releases that directly into a duct that empties out into our cavity into the lumen in this case, the cavity or the lumen of our stomach. So if we zoom in on a small section of the lining we basically get the following microscopic diagram. So our exocrine glands consist of four important types of cells. We have mucous cells, we have chief cells, parietal cells and Gsels down all the way at the bottom of these ducts of our exocrine glands.