ventricles heart

The Ventricles Of The Heart

All types of blood circulation from the heart basically depend on the lower heart quadrants. The flow of blood from the heart to the lungs for oxygen (Pulmonary Circulation) is done by the Right Ventricle while a flow of oxygenated blood from the heart to the rest of the body (Systemic circulation) is done by the left Ventricle.

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They have 85ml of blood capacity in adults and narrower than the atria for more pressure to pump blood further.

Here is a look at their similarities:

  1. They receive blood during blood during diastole and release it to the arteries during contraction (systole)
  2. Both of them have thick walls to withstand the high pressure without failing.
  3. They prevent blood backflow through the papillary muscles that control the closing and opening of the valves.

The Right Ventricle.Responsible for pulmonary circulation. Properties. Located under the right atrium and supplied with blood from through the tricuspid valve.

Receives and pumps deoxygenated blood to the lungs through the left and right pulmonary arteries… Its Middle layer is thin and the chamber is longer to accommodate any blood volume fluctuations. Appears triangular from a side view but it has a crescent shape when dissected cross-sectionally. Has Thinner walls 2-5mm reducing in density towards the atrium. This results in a lower pressure than the LV.



IT’S external layer (endothelial) has more fiber making it less elastic than that of the Left ventricle. This reduces the pressure on the tricuspid valve which is way more destructible. The Left Ventricle responsible for Systemic blood circulation. Properties. It is narrow and thickened between 7-11 mm wall thickness for maximum pressure. It is the thickest chamber of the heart. It is circular from an external view but concave on a crossectional view.

It is shorter than the Right ventricle hence more structured for pressure than volume. This is meant to flush all oxygenated blood into the body. Served by the strongest Myocardial muscles (middle layer of the heart walls) for maximum pressure to pump blood to the whole body.

Receives oxygenated blood from the left auricle through the mitral valve and pumps it to the rest of the body through the Aorta at high pressure. Heart failure occurs when the ventricles of the heart cannot perform their functions properly. The ventricles perform the hardest roles of the heart making them more susceptible to failure due to stiffness or cardiac muscle failure.

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