If a blood clot forms, it can stop the blood flow. This can cause a heart attack or stroke. A heart attack occurs when the blood flow to a part of the heart is blocked by a blood clot. If this clot cuts off the blood flow completely, the part of the heart muscle supplied by that artery begins to die.
Digestion works by moving food through the GI tract. Digestion begins in the mouth with chewing and ends in the small intestine. As food passes through the GI tract, it mixes with digestive juices, causing large molecules of food to break down into smaller molecules.
These organs include the pancreas, the liver and the gallbladder, as well as several different glands. Without the aid of the accessory organs of the digestive system, digestion would not occur within the stomach or small intestine. Each organ and gland plays a very specific role in the system. In this way, they are as essential to the process as the main organs where digestion actually takes place.