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Test: Human Anatomy and Physiology
1. | What in one defining characteristic of veins? |
They carry deoxygenated blood from capillaries to the heart
They carry blood from the heart to the capillaries
They have a muscular layer allowing them to expand and contract, thus regulating blood pressure
They carry blood from capillaries to the heart
They carry deoxygenated blood from the heart to the capillaries
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