Transcription: The renal system consists of the kidneys, the connecting arteries and veins, and the urinary tract. The kidneys are paired, bean-shaped organs lying outside the peritoneal cavity in the back of the upper abdomen, one on each side of the vertebral column. The kidneys function as the body's main excretory organs, eliminating the body's metabolic waste products by filtering the blood, substances that are unneeded or present in excess are filtered out of the blood and form into urine, moving via the ureter into the bladder before being expelled through the urethra. The kidneys also selectively rea ...
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