Knowing the different body mechanisms has helped merge the field of engineering and biology. Many cool inventions like the PET scan and the MRI have helped change the face of medicine in diagnosing and treating different diseases of the brain and body. With instruments such as these we can detect whether a certain phobia affects the size of a region of the brain! Even cooler are surgical robots which have the ability to peel a grape, showing how much we have advanced to such intricate technology!