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.
exists and is an alternate of . Obviously,digestion begins in the mouth. People eat the food. That is the beginning. Nothing starts without beginning. The teeth work to chew food into small pieces, because the greater surface area, the faster and more effective the gastric juices (acids and enzymes) can further dissolve the food.