Walking and Injuries. Any pain in the chest while walking, no matter what its cause, can be troubling -- especially if you've reached middle age, when the risk of heart disease rises. Such pain may have nothing to do with your heart, however.
The stomach, liver, spleen, gallbladder, and most of the small and large intestines are in the abdominal cavity. Many of the organs of the abdominopelvic cavity are covered by the visceral peritoneum, while the wall of the abdominal cavity is lined with the parietal peritoneum. Peritoneal fluid fills the cavity between the visceral and parietal peritoneum.
Vital organs such as heart and lungs are protected by the rib cage. Under the rib cage lie many organs that form a part of the abdomen. Most of the organs that lie in the abdominal region are a part of the digestive system. These include the liver, gallbladder, kidneys, pancreas, spleen, stomach, small intestine and the large intestine.