Doctors can often see a large hiatus hernia on a chest x-ray. Otherwise, people are given barium in a liquid before x-rays are taken (barium swallow). The barium outlines the esophagus, making abnormalities easier to see. Hernias can also be seen during an upper endoscopy.
The kidneys filter the blood to remove wastes and produce urine. The ureters, urinary bladder, and urethra together form the urinary tract, which acts as a plumbing system to drain urine from the kidneys, store it, and then release it during urination.
The channel of elimination for the waste products of RBC destruction. It is an excretion and secretion. As a secretion it aides in the breakdown of fats. Collected from the liver cells by the ducts and either carried to gallbladder for temp storage or poured directly into duodenum through the common bile duct.