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.
The digestion process begins in the mouth. Teeth, salivary glands, and the tongue work together to break down the food into a substance that can be easily swallowed. The teeth tear and smash the food. The salivary glands secrete enzymes, which prepare the food for digestion in the stomach.