Researchers at UCLA have created the first detailed computer simulation model of an injured human leg–complete with spurting blood. The simulation is designed to make training for combat medics more realistic. “To create the simulator model, researchers combined detailed knowledge of anatomy with real-life CAT scans and MRIs to map out layers of a human leg–the bone, the soft tissue containing muscle and blood vessels and the skin surrounding everything. Then the design team applied physics and mathematical equations, fluid dynamics, and pre-determined rates of blood flow from specific veins and arteries to simulate blood loss for wounds of varying sizes and severity.”