Heart

Why is the left ventricles larger than the right ventricles and why are its walls thicker and more muscular?

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2011-04-19 23:23:59
2011-04-19 23:23:59

It is a result of thousands of years of evolution. But you also have to look at their functions. The left ventricle is pumping deoxygenated blood through the pulmonary artery to the lungs and back to the left part of the heart (including the left ventricle) which then pumps the oxygenrich blood out in the body. I guess you can imagine that pumping the blood in the body requires more work than pumping the blood to the lungs and back.

I suggest you read more about the circulatory system and the heart if you have an exam or something that you have to prepare to.

Best regards

premed student

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because left ventricle pumps the oxygenated blood forcefully to the different parts of the body through the systemic aorta.


No, your left ventrical is larger in size and has thicker walls, because it deals with more pressure.


The right ventricle pumps blood to the lungs, and the left ventricle pumps blood to the body. The left ventricle is much more muscular than the right and has much thicker walls.



The lower two chambers of the heart are the ventricles. The left ventricle is larger, with thicker walls, than the right ventricle.


The walls of the ventricles of the heart aren't thinner than the atria, they are thicker. This is because they require more power as they pump blood around the body, while the atria only pump blood the short distance into the ventricles. More muscular walls are therefore needed to provide this power which is why they are thicker. The left ventricle is even thicker than the right ventricle as it requires a lot more power to pump blood all around the body. The right ventricle only pumps blood to the lungs.


You really can't compare the apex with both because of the apex is made up of only one of the ventricles (the left) and the left is thicker than the right.


The ventricles are the part of the heart that are responsible for the pumping action to move blood throughout the body. Therefore, the muscles in the ventricles are much larger and thicker to do their job properly. The atrium only has to pump blood through an open valve (the tricuspid valve) into the right ventricle. There is much less resistance to this flow of blood so much less muscle is needed.


uricles are part of the atria and serve to increase the volume of the atria. The atria that they are a part of serve to direct blood into the ventricles and are not very muscular. The ventricles are far more muscular than the atria and serve to pump blood to either the lungs or the rest of the body ( the right and left ventricles respectively).


The wall of the ventricles is thicker than the walls of the atria as they have to be stronger as they have to pump the blood around the body where as the atria only have to pump blood into the ventricles



The lower (ventricles) are muscular and the valves can seal both openings. The upper (atria) are significantly weaker and are not sealed at the venous portal. Both left sides are thicker and stronger than the right (systemic pressure is much higher than pulmonary).


The left side of the heart has larger muscle.


The left ventricle has to pump blood further (through out the body) and has to do that with more force.


The interventricular septum separates the left and right ventricles. This muscular wall prevents the mixing of oxygen-rich and oxygen-poor blood.


The walls of the left ventricle are thicker than those of the right because the left side of the heart must generate more force. Since the systemic circulation is longer than the pulmonary, more force is needed to push the blood.


Some terminology first: The upper chambers = atria (singular atrium) The lower chambers = ventricles The atria are responsible for receiving blood: the right atrium receives deoxygenated blood from the body and the left atrium receives oxygenated blood from the lungs. The atria only pump this blood into the ventricles and therefore do not need particularly thick muscular walls. The ventricles on the other hand are responsible for pumping the blood received from the atria to the body. The right ventricle pumps the deoxygenated blood it receives from the right atrium out of the heart and into the lungs. On the other hand, the left ventricle is responsible for pumping the oxygenated blood received by the left atrium to the rest of the body. It is because of the this that the walls on the side of left ventricle are the thickest. The left ventricle requires "more muscle" than the right ventricle as the distance it has to pump the blood is far greater. So, SHORT ANSWER: The walls of the lower chambers/ventricles are thicker and more muscular than the walls of the upper chambers/atria because they have to pump blood out of the heart and to the body as opposed to the atria which only receive blood from the body and then pump into the ventricles.


The walls of the left chambers are thicker than those of the right chambers. They need to generate more pumping force, since the systemic circulation is longer than the pulmonary circulation.


The heart has four chambers. The two ventricles (right and left) are muscular chambers that propel the blood out of the heart (the right ventricle to the lungs, and the left ventricle to all other organs). The two atria (right and left) hold the blood returning to the heart, and at just the right moment empty into the right and left ventricles...


There are 2 ventricles: Left and Right


I don't get it-it should be the 'heart's anatomy' the heart is a very muscular organ and divided into four compartments the right and left ventricles and auricles.



Heart consists of four chambers. left and right atria and right and left ventricles. the lower chambers are called ventricles.


yes....Left ventrical has the harder job of pumping blood to the entire body, its walls are thicker than those of the right ventricle, which pumps blood a relatively short distance to the lungs.


This is just what is left of the primordial atrium and in adult life is just a small ear shaped (that where the name comes from) pouch on the right artium. It has almost no function other than to increase the volume of the atrium and its contraction force is roughly similar to that atrium. The atria dont have very thick walls as they do not need to pump very hard to get the blood into the ventricles. The ventricles must get the blood all around the body (left ventricle) or to the lungs (right ventricle) which require much more force and so the walls arethicker to provide the necessary stren



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