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20. Ventricles are the _______ chambers of the heart. A. bottom B. top C. smaller D. middle

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Smaller because The atrium (an adjacent/upper heart chamber that is smaller than a ventricle) primes the pump.
User Dylan Oliver
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Ventricles are A - bottom of the heart. The top would be the atrium chambers, near the aorta. Have a great day!!

User Spzvtbg
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