교과서 질문
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
Arteries always carry oxygenated blood away from the heart, and veins always carry deoxygenated blood toward the heart.
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19. The Blood Vessels
Veins
Multiple Choice
Which of the following is true regarding veins?
A
Veins carry blood away from the heart.
B
Veins are primarily responsible for oxygenating blood.
C
Veins contain valves to prevent backflow of blood.
D
Veins have thicker walls than arteries.
검증된 단계별 안내1
Understand the function of veins in the circulatory system. Veins are blood vessels that carry blood towards the heart, not away from it.
Recognize the structural features of veins. Unlike arteries, veins have thinner walls and are equipped with valves to prevent the backflow of blood, ensuring it moves in the correct direction towards the heart.
Differentiate between the roles of veins and arteries. Arteries are responsible for carrying oxygenated blood away from the heart to the rest of the body, while veins return deoxygenated blood back to the heart.
Consider the oxygenation process. Veins are not primarily responsible for oxygenating blood; this occurs in the lungs where blood is oxygenated before being carried by arteries.
Identify the correct statement about veins. The presence of valves in veins is a key feature that prevents backflow, ensuring efficient circulation of blood back to the heart.
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