The scientific study of the functions and processes present in a biological system is referred to as. The study of how organisms, organ systems, cells, individual organs, and biomolecules carry out all the chemical and physical processes in a living system is the focus of the subdisci- pline of biology known as physiology. The subject of study may be segmented into medical physiology, plant physio- logy, animal physiology, cell physiology, or comparative physiology according to the classifications of organisms that are being studied. The book in the field of physiology continues to retain its rich legacy by presenting important physiology principles in a way that is incredibly clear and interesting. This textbook on medical physiology includes all of the main systems that are found in the human body, with an emphasis on the interactions between systems, homeo- stasis, and pathology. This straightforward textbook will introduce students to the human body like a living thing that performs a variety of functions. Students will learn precisely what occurs when regular bodily processes are disrupted by sickness, as well as how the body attempts to reestablish a state of balance as well as health after it has been disturbed.