Physiology is the study of how living organisms function and the processes that maintain life. It focuses on understanding how various organs, tissues, and cells work together to carry out vital functions such as circulation, digestion, respiration, and reproduction. Physiologists study how different systems in the body, such as the nervous, muscular, and endocrine systems, interact and regulate internal processes to maintain homeostasis. This field of research plays a crucial role in advancing our knowledge of health and disease and developing new treatments and therapies.