Pathology is a crucial subject of contemporary medical diagnosis and scientific investigation. Its main focus is on the study of how diseases come to be, whether they are brought on by pathogens or non-infectious physiological issues. Pathos, which means "suffering," and -logy, which means "study of," is the roots of the word pathology. This broad and deep scientific discipline aims to understand how tissues and cells are damaged, how the body reacts to the damage, and how the body repairs itself. Cellular reactions to injury, necrosis, inflammation, wound healing, and neoplastic are all subjects of investigation.