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Let's get straight to the heart of the matter—the heart's job is to move blood. Day and night, the muscles of your heart contract and relax to pump blood throughout your body. When blood returns to the heart, it follows a complicated pathway.
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www.pbs.org/wgbh/nova/heart/heartmap.html
www.pbs.org/wgbh/nova/heart/heartmap.html
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Pioneers of Heart Surgery; Learn how military doctors working during World War II pioneered advances in antibiotics, anesthesia, and blood transfusions that ushered in ... Map of the Human Heart (Hot Science); See exactly how blood flows through the amazing muscle called the human heart and learn fascinating heart facts.
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www.pbs.org/wgbh/nova/heart/
www.pbs.org/wgbh/nova/heart/
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From the moment it begins beating until the moment it stops, the human heart works tirelessly. In an average lifetime, the heart beats more than two and a half billion times, without ever pausing to rest. Like a pumping machine, the heart provides the power needed for life.
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www.fi.edu/learn/heart/
www.fi.edu/learn/heart/
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The human body is like a complex organization that has an important job to get done on a tight deadline. ... Index of all "The Human Heart" pages ... You are viewing a page in The Franklin Institute's online exploration of the human heart. It is one of many Resources for Science Learning which inspire scientific curiosity.
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www.fi.edu/learn/heart/systems/systems.html
www.fi.edu/learn/heart/systems/systems.html
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Heart - Wikipedia, the free encyclopedia
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The heart is a muscular organ found in most vertebrates that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions. The term cardiac (as in cardiology) m...
en.wikipedia.org/wiki/Heart
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Human heart - Wikipedia, the free encyclopedia
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The human heart provides a continuous blood circulation through the cardiac cycle and is one of the most vital organs in the human body. It is divided into four chambers: the two upper chambers are ...
en.wikipedia.org/wiki/Human_heart
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TV listings for Human Heart
Zip Code: 60601 · Provider: Comcast SW Chicago (1, 4 & 5)-Digital Rebuild (Chicago) Edit
Ask TV · TV data from Zap2it
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If we multiply the normal, non-athlete output by the average age of 70 years, we see that the cardiac output of the average human heart over a life time would be about 1 million litres, or about 250,000 gallons(US)
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www.worldinvisible.com/apologet/humbody/heart.htm
www.worldinvisible.com/apologet/humbody/heart.htm
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