Pathology is the science of studying all aspects of human diseases. It studies illnesses that can be passed on genetically, including conditions that plague the blood, tissues, organs and body systems when attacked by microorganisms like viruses and bacteria. It is the study of the human body, but more than that, it documents where and how and why the body malfunctions, or sometimes, one of its systems goes against the whole.
The line between healing medicine and Pathology isn't really that distinct. One cannot exist without the other. Medical technology discovers a new condition that Pathology can analyze, producing new studies and results that make medicine ever more efficient and accurate. In this regard Pathology and Laboratory Medicine are taken combined in order to understand the causes and mechanisms of human disease, by means of investigations in the laboratory.
Modern media, particularly several television shows, have given the public a peek into laboratories where doctors and their assistants perform forensic tests on victims of crimes. Forensic is just one of the discipline's many branches. Anatomical Pathology, for instance, specifically studies the correlation between disease and body tissues.
The world today can barely survive existing biological threats without the medical and scientific advancements made possible by Pathology's discoveries. It's one of the sciences that made it possible for man to move out of the dark ages of superstition and ancient religious rituals to perform or understand otherwise complex diagnoses of ailments.