CARDIOVASCULAR SYSTEM

There are three on this campus. Disneyland has one every 100 yards. THE HEART NEEDS ITS OWN BLOOD/O2 . The blood vessels for the actual muscle that makes up the heart comes from vessels that are on the outside of the heart = CORONARY ARTERIES. The more you exercise, the more branches of these arteries are formed, and the better the blood supply ... ................
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