WHAT IS BLOOD PRESSURE?
Blood Pressure is the Pressure of the blood against the walls of the blood vessels. The term usually refers to the pressure of the blood within the arteries , or arterial blood pressure. This pressure is determined by several factors, namely: The pumping action of the heart The resistance to the flow of blood in the arterioles, The elasticity of the walls of the main arteries The quantity of blood within the blood vessels and The blood's viscosity, or thickness The pumping action of the heart refers to how hard the heart pumps the blood (force of the heart beat) and how much blood it pumps and how efficiently it does the job. Contraction of the heart, which forces blood through the arteries, is the phase known as SYSTOLE. Relaxation of the heart between contraction is called Diastole.