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