The main focus of the study of human physiology is to understand how the human body functions and responds to various internal and external stimuli. It encompasses the examination of organ systems, cellular processes, and biochemical mechanisms that maintain homeostasis. Human physiology explores the complexities of bodily functions, such as metabolism, circulation, respiration, and reproduction. By studying these processes, researchers can identify how different systems interact, address health issues, and develop medical treatments. A deep understanding of human physiology is essential for advancing healthcare and improving quality of life.