This foundational course provides a comprehensive overview of the major categories of human diseases and disorders, exploring their underlying pathophysiological mechanisms, common etiologies, and characteristic clinical presentations across various body systems. Participants will develop a systematic understanding of how genetic, infectious, environmental, and lifestyle factors contribute to the development and progression of illness. By correlating core concepts of pathophysiology with real-world clinical manifestations, this course equips healthcare professionals and students with the essential knowledge base necessary for effective patient assessment, education, and clinical decision-making.