Which chamber of the heart is the thickest?

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(A) The heart consists of four chambers: two atria and two ventricles. The ventricles have thicker walls than the atria because they are responsible f

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Left ventricle

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(A) The heart consists of four chambers: two atria and two ventricles. The ventricles have thicker walls than the atria because they are responsible for pumping blood out of the heart. Among the two ventricles, the $Left 	ext{ ventricle}$ has the thickest muscular wall. This is because it must generate enough pressure to pump oxygenated blood through the entire systemic circulation to all parts of the body.

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