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.
Waste products of metabolism are excreted from the body by the kidneys through the urine. The urine contains wastes that have been filtered from the blood by the kidneys, and the resulting solution is a pale, straw yellow, or amber-colored liquid that comes out of the body through the urethra.