In general, the abdominal organs under the left rib cage include the stomach, part of the pancreas, spleen, etc., and the thoracic organs include the heart and lungs. 1. Stomach: The stomach is a digestive organ in the human body, which plays the roles of digestion, absorption, secretion, transportation and emptying. If dietary irregularities will lead to damage to the gastric mucous membrane causing damage to the disease, common gastric diseases such as gastroenteritis, gastric ulcer. 2. Pancreas: The main role of pancreas in human body is to assist human digestion, pancreas can secrete a lot of pancreatic digestive enzymes to promote digestion, and also take on the function of exocrine, able to regulate blood glucose and secretion of growth inhibitors. Common pancreatic diseases include acute pancreatitis, chronic pancreatitis, pancreatic tumors and so on. 3. Spleen: The spleen is an important organ in the human body, which has the functions of immunity, regulating blood volume, destroying senescent cells, and storing blood, etc. Common spleen diseases include rupture of spleen trauma, splenic embolism, and hypersplenism. 4. Heart: The heart is a very important organ of the human body, which undertakes the role of maintaining circulation and promoting metabolism. Common heart diseases include coronary heart disease, heart valve disease, congenital heart disease, and so on. 5. Lungs: Lungs and heart are equally important and are the only organs that maintain normal respiratory function. Common lung diseases include pneumonia, tuberculosis, lung cancer, bronchitis and so on. Every organ in the human body is very important. In our daily life, we should eat reasonably, cultivate good habits and strengthen exercise in order to make our body functions stronger and stronger, and it is recommended that we go to the hospital for regular medical checkups to ensure that we are in good health.