Now, adjacent to our ducts we basically have our capillary system that connects to our blood vessels as well as to our lymph vessels and these vessels exchange waste products and bring nutrients and oxygen to the cells found on the lining of our stomach and the lining of these exocrine glands. Now below the blood vessels we have our muscle. We have a three layer muscle system that is responsible for contraction of the stomach and that ultimately allows the movement of our food from our stomach along the stomach and into our small intestine. So now let's focus on each one of these four cells and discuss the functionality of these cells. And later we're also going to mention a fifth cell found in our stomach lining, also known as the anterochromaphin like cell. So, let's begin with our mucus cell.