The field of wound ballistics largely comprises the study of the physiology and medical effects of projectile weapons (chiefly, but not exclusively, bullets) on humans or animals. A projectile is any object propelled through space by the exertion of a force which ceases after launch A weapon is a Tool used either in Hunting, or attack or defence in Combat for the purpose of subduing enemy personnel or to destroy enemy weapons A bullet is a solid Projectile propelled by a Firearm or Air gun and is normally made from metal (usually Lead) It can be considered the intersection of medicine and terminal ballistics. Medicine is the art and science of healing It encompasses a range of Health care practices evolved to maintain and restore Human Health by the Terminal ballistics, a sub-field of Ballistics, is the study of the behavior of a Projectile when it hits its target