Your cardiovascular system is an amazing network which keeps your body supplied with the oxygen-rich
blood you need. As with anything that gets constant use, your cardiovascular system needs care to function well. The remainder of
this manual will help you learn more about how your cardiovascular system works, what you can do to keep it in the best possible
condition, how to recognize the warning signs that your heart or blood vessels need attention, and what can be done if something
does malfunction.
