Systemic physiology is the study of how different systems in the body work together to maintain overall health and function. It focuses on the interactions between various organ systems, such as the cardiovascular system, respiratory system, and nervous system, to understand how they coordinate to support life processes. This field examines processes like blood circulation, gas exchange, and neural signaling, highlighting the importance of homeostasis. By understanding these interactions, researchers can better comprehend how diseases affect the body and develop effective treatments to restore balance and health.