Human Brain Anatomy, Lateral View - A illustration of the human brain from a lateral (side) view. The different regions of the brain are colored red (frontal lobe), blue (parietal lobe), yellow (temporal lobe) and green (occipital lobe).
Scanning electron micrograph of a kidney stone (nephrolithiasis). Kidney stones form when salts, minerals and chemicals in the urine (for example calcium, oxalate and uric acid) crystallise and solidify. Small kidney stones are often passed naturally but