Which statement is not true about the circulatory system?

Which statement is not true about the circulatory system?

• A. Blood moves through arteries
• B. Veins return blood to the heart
• C. The heart has 3 chambers
• D. The heart has 4 chambers

Answer: (C)

The circulatory system question tests understanding of how the heart is structured and how blood flows. In humans, arteries carry blood away from the heart and veins return blood to the heart. The heart itself has four chambers: two atria and two ventricles. This four-chamber design keeps the blood separate into the pulmonary (to the lungs) and systemic (to the body) loops, with the right atrium receiving deoxygenated blood and the left atrium receiving oxygenated blood before it’s pumped out by the ventricles. So saying the heart has three chambers isn’t true for humans.

The circulatory system question tests understanding of how the heart is structured and how blood flows. In humans, arteries carry blood away from the heart and veins return blood to the heart. The heart itself has four chambers: two atria and two ventricles. This four-chamber design keeps the blood separate into the pulmonary (to the lungs) and systemic (to the body) loops, with the right atrium receiving deoxygenated blood and the left atrium receiving oxygenated blood before it’s pumped out by the ventricles. So saying the heart has three chambers isn’t true for humans.