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.
Although protein digestion begins in the stomach, pancreatic enzymes break the final polypeptide chains into amino acids. The gallbladder stores secretions from the small intestine and empties them into the liver. The pancreas secretes a substance that emulsifies fat globules. The stomach secretes most of the enzymes needed for carbohydrate digestion. The digestion of food particles takes place in the small intestine, but the absorption of these digested particles takes place in the large intestine.