Compared to the blood flowing into the left ventricle, the blood flowing into the right ventricle:

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11ecba2d_0ff1_c4ea_a3bf_b53715478877_MD0008_00 The heart is a muscular structure with four chambers: The left and right atria receive blood and the left and right ventricles pump blood through the circulatory system. The heart is composed of two separate pumps that contract simultaneously; the right heart pumps blood to the lungs, whereas the left heart pumps blood to the rest of the body. Because the left ventricle must pump blood to a larger structure (all body tissues except the lungs) across longer distances, it must pump blood at a higher pressure. To generate the high pressure necessary to propel blood through the body's entire circulatory system, the walls of the left ventricle must be extremely muscular and powerful (ie, thicker). Accordingly, the right ventricle has thinner walls than the left ventricle because it needs to pump blood at a lower pressure to propel blood to the lungs only (Choice D). (Choice A) Blood flowing through the right ventricle has lower oxygen concentration than blood flowing through the left ventricle. This is because deoxygenated blood from body tissues passes through the right heart (right atrium and right ventricle) before being sent to the lungs. Oxygenated blood from the lungs passes through the left heart (left atrium and left ventricle) before being sent to the body. (Choice B) The following reaction takes place in red blood cells: 11ecba2d_0ff1_c4eb_a3bf_2b380e51fabf_MD0008_00 CO2g+H2Ol↔H2CO3aq↔HCO3-aq+H+aq The higher the CO₂ concentration, the more the forward reaction is favored. Therefore, the deoxygenated (CO₂-rich) blood in the right ventricle also contains more H⁺ ions and so has a slightly lower pH than the oxygenated (CO₂-poor) blood of the left ventricle. Educational objective: The right ventricle has thinner walls than the left ventricle because it needs to pump blood at a lower pressure to reach only the lungs. In contrast, the thicker walls of the left ventricle allow it to pump blood at a higher pressure to reach all other tissues in the body.

Compared to the Blood Flowing into the Left Ventricle, the Blood