A comprehensive block diagram of the Blood Pressure Control (BPC) System of the body based on Control Engineering principles was designed through extensive research on the role of the CNS in BP control. The BPC system developed is the first to incorporate in one process system the three mechanisms of blood pressure regulation in the body. During the course of this research it was found that the CNS plays the role of a controller and achieves this by regulating the actions of the heart, blood volume and blood vessel diameter through the cardiac and vasomotor centers in the medulla oblongata of the brain. This regulation is carried out through Nervous stimulation via Parasympathetic and Sympathetic nerves of the cardiovascular system, and Hormonal stimulation via the Renin-Angiotensin-Aldosterone System (RAAS) and Adrenal gland. The Chemical Engineer
