★ Circulatory and Lymphatic System Quiz
What is the difference between the pulmonary vein and all the other veins of an adult?
A. It carries oxygen-poor blood, while the other veins carry oxygen-rich blood
B. It carries oxygen-rich blood, while the other veins carry oxygen-poor blood
C. It carries blood to the heart, while the other veins carry blood away from the hear
D. It carries blood away from the heart, while the other veins carry blood to the heart
Select your answer:
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A. Arteries
B. Arteriole
C. Capillaries
D. Venules
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Most of the chloroplast cells are found in the
A. upper epidermis
B. pallisade mesophyll layer
C. lower epidermis
D. stomata