Question

The Heart:

4. Two large veins that drain blood from the upper body and from lower body and empty it into the right atrium of the heart are known as the

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5. Two of the four chambers with powerful muscular contractions that force blood to flow through arteries to all parts of the body

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6. One-way valves that prevent blood flow in opposite directions (blood should flow from atria to ventricles)

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7. Two of four chambers (left and right) are thin walled structures that collect blood from the major veins and empty it into the larger, more muscular ventricles

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Answer 1