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The cardiovascular system consists of the heart, blood vessels, and blood. This system has three main functions: Transport of nutrients, oxygen, and hormones to cells throughout the body and removal of metabolic wastes (carbon dioxide, nitrogenous wastes).
Blood pressure is regulated around a set point controlled by the brain stem nuclei called the vasomotor center. Based on signals from the BP sensors, the brain stem then sends signals to the heart and blood vessels via the autonomic nervous system.