Biomedical Laboratory Science

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Showing posts with label Anatomy. Show all posts
Showing posts with label Anatomy. Show all posts

Sunday, July 3, 2016

Anatomy of the Heart

The heart sits in the middle of the chest behind the sternum, and extends towards the left side. It is a strong muscular pump, about the size of its owner’s clenched fist. It has four chambers:
  • two atria, which receive blood to pump to the ventricles
  • two ventricles, one that pumps blood to the lungs (right), and another that pumps blood to the body (left)
In the average adult, the heart beats around 60 – 100 times per minute, sending about six litres of blood through well over 1,000 complete circuits of the body each day.

During a lifetime of 70 years, the heart will beat more than 2.5 billion times. The only rest it gets or needs is a split-second pause between beats.


Source: learncpronline
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