Previous chapters emphasized physiologic concepts concerning cardiac and vascular function at the cellular and organ level. In addition, they examined mechanisms, such as baroreceptors and circulating hormones, that regulate overall cardiovascular function. This chapter integrates all the components of the cardiovascular system and shows how they work together to maintain normal perfusion of organs under conditions of increased organ demand for blood flow (., during exercise and pregnancy) or during abnormal stressful conditions such as hemorrhage
