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Question

Select the incorrect statements.
A. Arteries have thick elastic walls and veins have valves.
B. Capillaries are the smallest blood vessels supplying the tissues.
C. AV node is known as the pace setter of the heart.
D. Arteries carry blood towards the heart and veins carry blood away from the heart to different organs.

A
A and B
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B
A and C
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C
C and D
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D
D only
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Solution

The correct option is D D only
Arteries are blood vessels that carry blood away from the heart. While most arteries carry oxygenated blood, there are two exceptions to this, the pulmonary and the umbilical arteries. All veins carry blood towards the heart.
Therefore, the correct answer is option D.

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