The cardiovascular system is a network composed of the heart and blood vessels to deliver oxygen and nutrients to all body tissues. However, there are similarities and differences between men and women, with respect to the structure and function of the cardiovascular system. According to a research, the size of the heart and major blood vessels are smaller in women than in men. Before puberty, there are no differences among sexes in relation to the size of the heart, but after puberty the “absolute heart mass is greater in men than in women by about 15-30%” (Leinwand, 2003). Also, healthy young men and women have no difference in cardiac index, but have alterations in cardiovascular stress; “men response by increasing mainly vascular resistance,
