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.
Several organs of the digestive system are involved in the digestion process. The process starts in the mouth and passes through the esophagus, stomach, small intestines, large intestines, rectum and ends with the anus. But, before we go further, it is important to know what controls the digestive system.