The cardiovascular system is one of the most important in the human body. Thanks to the blood circulation, it allows the exchange of Oxygen and Carbon Dioxide to the cells and the distribution of nutrients, hormones, and much more. My work at the Jet Propulsion Laboratory was focused on developing a mathematical model capable of simulating the human cardiovascular system and its adaptability to space conditions. In particular, I studied the influence of gravity on the system. Finally, the model has been implemented using Python language.