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.
There are many blood vessels in the kidneys, and from the blood, the cells of the kidneys take out water and waste products, especially the wastes from protein foods.he process of excretion is somewhat the same in kidneys, liver, and skin, except that in each of these organs the wastes pass from the blood into a special liquid, which is later discharged from the body.