Gastric Secretion Gastric secretion is the process by which the stomach secretes digestive enzymes and other substances to break down food. This process tak...
Gastric Secretion
Gastric secretion is the process by which the stomach secretes digestive enzymes and other substances to break down food. This process takes place in four stages:
Mechanical digestion: The food is churned and mixed with gastric juices to break it down into smaller pieces. This process is driven by the muscular contractions of the stomach muscles.
Chemical digestion: The gastric juices contain enzymes such as pepsin, which break down proteins into smaller peptides. The enzymes also break down carbohydrates and fats into simpler molecules.
Absorption: The digested food products are then absorbed into the bloodstream through the walls of the small intestine. This process is driven by the concentration gradient of nutrients across the intestinal cells.
Excretion: The waste products from digestion are eventually expelled from the body through the rectum.
Gastric secretion is a critical process for the digestion and absorption of nutrients in the body. By secreting digestive enzymes and other substances, the stomach helps to break down food and make it more digestible for absorption