HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Kidney tubules. Light micrograph of a section through a kidney showing numerous tubules (light orange). Tubules are part of the filtration system in a kidney. Blood passes through capillaries in the kidney, and fluid and molecules of waste products pass into the tubules. During the passage through the tubules, much of the water is reabsorbed, leaving a concentrated solution of waste products. This drains to the ureters, which pass it to the bladder as urine. Magnification: x110 when printed at 10 centimetres wide.
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