i have know clue
It uses the Latin words for heart (cardio) and a small vessel (vasculum).
Because of the need to breath by homsapiens, the lack of oxygen forces the blood to pump less oxigenated blood or not pump at all. Without oxygen the body begins to break down and die with the brain...
The muscles use oxygen transported by the cardiovascular system.
The Cardiovascular System is comprised ot the heart and all of its arteries and veins. There is no particular organ called 'the cardiovascular'.
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