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Why are the walls of the lower chambers of the heart thicker and more muscular than the walls of the upper chambers?
Wiki User
∙ 8y ago
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.
Wiki User
∙ 11y ago
Wiki User
∙ 8y agoThe job of the upper chambers is to pump blood in lower chambers. For this purpose very less energy and power is needed. The job of the lower chambers is to pump the blood to the lungs and body. For this more power is needed. So the upper chambers are thin and less muscular. The lower chambers are thick and muscular.
Wiki User
∙ 14y agoAtrium
Wiki User
∙ 11y agoAorta
Wiki User
∙ 10y agoheart
Anonymous
vessels
Anonymous
ventricles
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One of two valves dividing the upper and lower chambers?
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How many chambers are present in human heart?
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Because the net weight of the fluid in the blood is bigger, because the bigger size of the lower chambers (ventricles) allows more blood to accumulate in there, thus causing the need for thicker walls
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The lower chambers of the heart are the ventricles. In contrast, the upper chambers are the atria.
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The heart cavity is divided down the middle into a right and a left heart, which in turn are subdivided into two chambers. The upper chamber is called an atrium (or auricle), and the lower chamber is called a ventricle. The two atria act as receiving chambers for blood entering the heart; the more muscular...
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The heart is divided into four chambers. The two bottom heart chambers are called the ventricles. The upper chambers are the atrials.
Which chambers of the heart are the ventricles?
The ventricles are the lower chambers of the heart. The atria are the upper changes.
What are the lever chambers of the heart?
The lower chambers of the heart are the left ventricle and the right ventricle.
