Rat kidney glomerulus. Fluorescence deconvolution micrograph of a section through a glomerulus in the healthy kidney of a rat. The different colours show different components; f-actin: green, g-actin: red, nuclei: blue. The function of the glomeruli is to filter waste products from the blood. After the reabsorption of certain substances elsewhere in the kidney, the liquid is transported to the bladder as urine. Magnification: x40 when printed 10 centimetres wide.