Each 2.54 square centimetre (a square inch) of human skin has six metres (20ft) of blood vessels. Veins hold about 65 per cent of the body's blood and have one-way valves tohelp blood move.

Using a blood pressure chart by age can help you interpret your results to see how they compare to the normal ranges across groups and within your own age cohort. Monitoring your blood pressure (BP) ...