Facts About the Cardiovascular System

•  In 1616, William Harvey, an English physician, is believed to be the
   first person to describe the heart/blood circulatory system.

•  During an average lifespan, the heart beats 3,000,000,000 times.

•  About 2,000 gallons of blood are pumped through your heart every
   day.

•  It takes a blood cell just 60 seconds to circulate throughout your body
   while at rest.

•  Blood that is rich in oxygen appears red, whereas blood low in oxygen appears bluish.

•  Blood pressure is the force your blood exerts against the walls of your blood vessels. This pressure is
   generated by the contraction of your heart.