Normally, the pumping of the heart creates a pulsing of blood along and against the walls of the blood vessels, which are flexible enough to dilate or contract. Sometimes, however, for a variety of reasons, the blood vessels may lose their flexibility, or the muscles surrounding them may force them to contract

Some common words found in the essay are:
Causes Approximately, , blood pressure, genetic factors, blood vessels, essential hypertension, heart pump,
Approximate Word count = 379
Approximate Pages = 2 (250 words per page double spaced)