Pneumococcal infections are caused by Streptococcus pneumoniae, a gram-positive, catalase-negative organism commonly referred to as pneumococcus.
Blood pressure is a measure of the changing fluid pressure within the circulatory system. It varies. from a peak pressure produced by contraction of the left ventricle, to a low pressure, which is. maintained by closure of the aortic valve and elastic recoil of the arterial system. The peak.
Blood pressure doesn't exactly correlate with 'fitness' per se although it can give an indication of general health. In general, blood pressure tends to rise with age and is a measurement of the pressure required to get the blood around the circulation. With age, arteries become 'furred up' and less elastic.