The lecture stipulates its origing from a field of Science known Biology. In this lecture there will be a detailed and clarified lecture on human physiology which underlines all the fundamentals of human working. The lecture will also be clarified with classification of organ system, with their functioning and metabolism activities. The lecture is crucial for students who need to pursue Medicine as their goal in order to understand how human breathe, digest, ciruclate, excrete or think in terms of Medical body.