To see the stereo effect, please gaze at infinity at a point between the two images. You should eventually see three images. The middle image will be a combination of the left and right images and it should look solid (stereo or 3d). The effect can sometimes be improved by holding a sheet of paper or card perpendicular to the image pair so that your left eye only sees the left image and your right eye only sees the right image. To focus, move your head closer to or further from the image. It might take a few tries to achieve the effect. Human Kidney translucent 3D view showing renal structure. The kidneys are paired organs responsible for controlling fluid balance and for the excretion of nitrogenous and other wastes via urine. The functional unit is called a nephron. Urine passes down the ureters to collect in the urinary bladder. |