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.
Digestion of carbohydrate begins in the mouth, with the secretion of the enzyme salivary amylase from the serous cells of the salivary gland. This enzyme breaks starch and glycogen into disaccharides.echanical digestion occurs in the mouth by the mixing and churning of food and the release of mucus to lubricate the food. The food containing fats essentially follow the same pathway as carbohydrate foods, with chemical digestion primarily beginning in the stomach. No chemical digestion of. lipids.