The Cardiovascular System is one of the most important systems in human body. It is made up of blood, blood vessels and the heart. In normal human body, the heart beats is about 100,000 times every day, which adds up to 35 million beats in a year and about 2.5 billion times in an average lifetime. Even when human are sleeping, their heart pumps 30 times its own weight (5L or 5.3qt) each minute, which amounts to more than 14,000 liters of blood in a day and 10 million liters in a year.
Our bodies actually have two circulatory systems: The pulmonary circulation is a short loop from the heart to the lungs and back again, and the systemic circulation (the system we usually think of as our circulatory system) sends blood from the heart to all the other parts of our bodies and back again.
Source: http://www.drstandley.com/bodysystems_cardiovascular.shtml
1 comments:
Very nice! To help you perform your best during your workout, you need to stay hydrated. Losing even one percent of your body weight through sweat can place added stress to your cardiovascular system. Two hours before working out drink at least 16 ounces of water.
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