Blood pressure consists of the force that is made by the blood on the walls of blood vessels, thanks to the function of the heart. It reaches its maximum value (approximately 120 mmHg) near the heart, and the minimum in the capillaries (about 30 mmHg).
There are some factors that can condition your blood pressure. These include cardiac activity, vascular tone, and consistency (viscosity) of the blood.
The healthy adult blood pressure values considered "normal" are 90-140 mmHg (systolic) and 60-80 mmHg, depending on the phase of the cardiac cycle. Blood pressure usually decreases during sleep, and increase during situations of strong emotions.
When blood pressure is above normal, this is a case of hypertension. The reverse case is known as hypotension.
