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The heart has two sides: the left and the right. The left ventricle is longer and more conical in shape than the right and forms the apex of the heart. The left side of the heart pumps oxygenated blood from the lungs to supply the rest of the body, while the right side pumps deoxygenated blood from the body to the lungs. As the left ventricle pumps blood at a higher pressure, it has thicker walls and more muscle than the right ventricle.
| Characteristics | Values |
|---|---|
| Ventricle with more muscle | Left ventricle |
| Reason for one ventricle having more muscle | The left ventricle pumps blood at a higher pressure as it has a further distance to travel, i.e., to all areas of the body |
| Difference in pressure between the two ventricles | The left ventricle pumps oxygenated blood from the lungs to supply the rest of the body whereas the right ventricle pumps deoxygenated blood from the body to the lungs |
| Difference in shape | The left ventricle is longer and more conical in shape than the right ventricle which is triangular in shape |
| Difference in wall thickness | The left ventricle has thicker walls than the right ventricle |
| Difference in volume | The left ventricle averages 143 g ± 38.4 g, with a range of 87–224 g whereas the right ventricle contains roughly 85 millilitres in an adult |
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What You'll Learn
The left ventricle pumps oxygenated blood to the body
The heart has two sides: the left and the right. The left side of the heart pumps oxygenated blood from the lungs to supply the rest of the body, while the right side pumps deoxygenated blood from the body to the lungs. The left ventricle pumps oxygenated blood to the body through the aorta, a large artery. This is possible due to the high pressure generated by the left ventricle, which is required to pump blood to the whole body through blood vessels.
The left ventricle has a more muscular wall compared to the right ventricle. This is because the left ventricle needs to generate much more pressure to pump blood from the heart into the body. In contrast, a lower amount of pressure is needed to pump blood the short distance from the right ventricle to the lungs.
The left ventricle receives oxygenated blood from the left atrium, which is pumped from the lungs through the pulmonary veins. The mitral valve opens to send blood from the left atrium to the left ventricle. When the left ventricle is full, it squeezes, closing the mitral valve and opening the aortic valve.
The aortic valve separates the left ventricle and the aorta. When the left ventricle contracts, blood is pumped through the aortic valve to the aorta, which distributes oxygenated blood to the body. The left ventricle pumps about 2,000 gallons of blood each day, with the heart beating about 100,000 times daily.
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The right ventricle pumps deoxygenated blood to the lungs
The heart is divided into two sides: the left and the right. The left side of the heart pumps oxygenated blood from the lungs to the rest of the body, while the right side pumps deoxygenated blood from the body back to the lungs.
The right ventricle is the bottom right chamber of the heart. It receives deoxygenated blood from the right atrium, which enters through the tricuspid valve. The right ventricle then pumps this blood through the pulmonary valve and into the main pulmonary artery (pulmonary trunk). The pulmonary trunk soon splits into the right and left pulmonary arteries, which carry blood to the right and left lungs, respectively.
The pulmonary arteries are the only arteries in the body that carry deoxygenated blood. This is a vital function, as the blood needs to reach the lungs to become oxygenated and get rid of waste products like carbon dioxide. After the blood is refreshed with oxygen, it returns to the heart, which pumps it out to the rest of the body through the aorta.
The right ventricle pumps blood a short distance to the lungs, requiring less pressure compared to the left ventricle, which pumps blood to the rest of the body. As a result, the left ventricle has thicker walls with more muscle to create more force for pumping blood.
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The left ventricle has thicker walls
The left ventricle is also longer and more conical in shape than the right ventricle, which is triangular and made up of two components: the sinus and the conus. The left ventricle forms the apex of the heart and a considerable part of the diaphragmatic surface of the heart. The right ventricle forms a small part of the sternocostal surface, while the left ventricle forms a large part of this surface.
The left ventricle has a much more demanding task than the right ventricle, and its thicker walls are an adaptation to this. The thicker walls allow the left ventricle to cope with the higher pressure of pumping blood to the whole body. The physiological load on the ventricles requiring the pumping of blood throughout the body is much greater than the pressure generated by the atria to fill them.
The left ventricle's function is integral to the cardiovascular system. Left ventricular contraction forces oxygenated blood through the aortic valve to be distributed to the entire body. Decreased function caused by injury or maladaptive change can induce disease symptoms and even heart failure.
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The left ventricle has a higher preload volume
The left ventricle receives oxygenated blood from the left atrium via the mitral valve and pumps it through the aorta via the aortic valve into the systemic circulation. The left ventricle pumps blood at a higher pressure because it has a further distance to travel, and blood from the left ventricle goes to all areas of the body. The left ventricle is thicker and more muscular than the right ventricle to create more force to pump the blood to the body.
The right ventricle, on the other hand, receives deoxygenated blood from the right atrium via the tricuspid valve and pumps it into the pulmonary artery via the pulmonary valve into the pulmonary circulation. The right ventricle is made up of two components: the sinus and the conus. The right ventricle is triangular in shape and has a crescent shape when viewed in cross-section.
The left ventricle is an integral part of the cardiovascular system. Left ventricular contraction forces oxygenated blood through the aortic valve to be distributed to the entire body. The left ventricular muscle must be able to increase or lower its pumping capacity under the control of the nervous system. In the diastolic phase, it must relax very quickly after each contraction to quickly fill with oxygenated blood flowing from the pulmonary veins. In the systolic phase, the left ventricle must contract rapidly and forcibly to pump blood into the aorta, overcoming the much higher aortic pressure.
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The left ventricle is conical, the right triangular
The human heart is divided into four chambers, two of which are ventricles. The left ventricle is conical, while the right ventricle is triangular. The left ventricle is responsible for pumping oxygenated blood from the lungs to the rest of the body. This requires significantly more force than pumping blood from the right ventricle to the lungs. As a result, the left ventricle has thicker walls and more muscle than the right ventricle.
The left ventricular muscle must contract and relax quickly and be able to adjust its pumping capacity under the control of the nervous system. During the diastolic phase, it rapidly relaxes after each contraction to fill with oxygenated blood from the pulmonary veins. During the systolic phase, it contracts forcefully to pump blood into the aorta, overcoming the higher aortic pressure.
The right ventricle, on the other hand, receives deoxygenated blood from the right atrium via the tricuspid valve. It then pumps this blood into the pulmonary artery through the pulmonary valve and into the pulmonary circulation. The right ventricle is the most anteriorly positioned chamber of the heart, located directly behind the sternum. Its complex geometry and retrosternal location create challenges in accurate diagnosis.
The distinct shapes of the left and right ventricles are important in echocardiography and congenital heart screening. The spatial relationship between the ventricular outflow tracts is one of the fundamental prerequisites for sonographers when screening for congenital heart malformations. The triangular shape of the right ventricular outflow tract, when viewed from the front, curves over the left ventricle, resulting in a characteristic "cross over" relationship.
In summary, the left ventricle is conical and has thicker walls due to the higher pressure workload it performs, while the right ventricle is triangular and wraps around the left ventricle. These differences in shape and muscle thickness reflect the distinct functions of the left and right ventricles in the human heart.
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Frequently asked questions
The left ventricle has more muscle than the right ventricle.
The left ventricle pumps oxygenated blood from the lungs to the rest of the body. This requires much higher pressure than pumping blood from the right ventricle to the lungs. The left ventricle has thicker walls to create more force and pump blood to the body.
The left ventricle is an integral part of the cardiovascular system. It receives oxygenated blood from the left atrium and pumps it through the aorta via the aortic valve.
