JOHN BAVOSI / SCIENCE PHOTO LIBRARY JOHN BAVOSI / SCIENCE PHOTO LIBRARY
Kidneys. Computer artwork showing normal human kidneys. The two kidneys are the organs responsible for filtering the blood and excreting waste products and excess water in the form of urine. The ureters are the long tubes seen at lower left and right. The ureters convey the waste fluid (urine) into a storage sac known as the bladder.
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