Cardiovascular disease is one of major diseases that contribute to mortalities and morbidities in industrialized countries. Seeking an in-depth understanding of what happens in the human body involving cardiovascular disease leads to investigation of the system using cardiovascular model. The objective of this work is to develop and analyze a model of the human cardiovascular system capable of simulating normal cardiac operation based on circuit analogy. To simulate the entire cardiovascular system, the models are divided to into three sub-systems: pulmonary circuit, cardiac circuit (consisting of left and right heart circuits) and systemic circuit. Modeling hemodynamics of blood flow circulation uses an electric circuit analogy called the lumped parameter method. Parameters of the model have been extracted from existing literature. Based on a previous model, the present work analyzes pumping characteristics of the cardiovascular system with 1 and 3 AC sources. It also investigates contraction of arterial characteristics when added at the right and left atriums. Simulation results are found to be in good agreement with biological data. © 2018 IEEE.