Outdoor Education

Four chambers of our heart

Updated on 26 July 2020



Few of us are aware of different chambers in our heart & how they function. The heart is a strong muscle that is responsible for circulating blood in the body. It’s a muscle that works throughout the lifespan. A normal heart rate can be somewhere between 60-100 beats per minute. 



The heart has 4 chambers

  •      – Right atrium 
  •      – Right ventricle 
  •      – Left atrium 
  •      – Left ventricle
These four chambers play different roles in circulating the blood. Right atrium receives deoxygenated blood from superior & inferior vena cavas. Then the blood moves down to the right ventricle. Ventricles usually are larger in size then the atrium. Ventricles also create more pressure to pump the blood out of the heart. From here, the heart contracts sending the blood out to the lungs through the pulmonary artery for filtration.
chambers of heart english

After filtration the pulmonary veins carry oxygenated blood back to the left atrium. Then from there it drops into the left ventricle. The left ventricle is the largest chamber of all four. From here the oxygenated blood is circulated to the entire body. 



The heart is a sophisticated muscle where all four chambers work in synchronisation. A gap of microseconds allows the chambers to be filled with blood for pumping again.



You might be thinking, if the blood circulation happens constantly, then what prevents the chambers from being overfilled?



Four valves that ere present in the heart help prevent the overfilling of chambers. These valves are located in different parts of the heart. Valves helps connect chamber to chamber & chamber to blood vessels. Blood volume & pressure within these chambers and blood vessels forces these valves to open, helping the blood move. These valves are:



  •  –  Tricuspid valve – Separating and regulating blood flow between right atrium & right ventricle
  •  –  Pulmonary valve – Separating and regulating blood flow between right ventricle & pulmonary artery
  •  –  Mitral (bicuspid) valve – Separating and regulating blood flow between left atrium and left ventricle
  •  –  Aortic valve – Separating and regulating blood flow between left ventricle and aorta.
  • Author – 
  • Amit Arora, Outdoor Leadership & Wilderness Medicine Educator.
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