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Monday, 15 August 2011

Know Your Heart Better In a Minute

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The Human Heart , its what we always associate with love, passion and life. But, do you have any idea of how it keeps pumping mindlessly and keeps you alive?

The heart is a great muscle, and one of the most used one. Consider the picture below, let A,B,C,D be the chambers of the heart, and the colored boxes be the valves.

The blood circulation process takes place as follows (where '>' =  from > to):

  • blood low in oxygen from BODY > opening in A > A > green > B > blue > LUNGS
  • here the blood gets filled with oxygen through the walls of the lungs
  • blood rich in oxygen from LUNGS > opening in C > C > yellow > D > red
  • blood rich in oxygen goes to different parts of the BODY
  • and the whole process continues
Now imagine both the RIGHT and LEFT sides working simultaneously, so the heart has both -rich in oxygen and low in oxygen blood, at the same time. (with A & D and B & C, forming pairs which contract and expand simultaneously) .Thats how the circulation of blood around your body takes place.

The heart transfers the blood in and out of each chamber through expansion and contraction of the chamber wall muscles. This muscle expansion and contraction is done by electric pulses sent through the heart muscles. The electric pulses are sent at the right time through a 'pacemaker cell' which is controlled by the brain. 

Hope you appreciate your heart better now :-)  

The Technical Names For The Different Parts Of The Heart : -
A - right atrium
B - right ventricle
C - left ventricle
D - left atrium
green - tricuspid valve
blue - pulmonary valve
yellow - mitral valve
red - aortic valve
the path of blood to the Lungs from the heart - pulmonary artery
the path of blood to the Body from the heart - aorta
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