The heart of a healthy person beats
A. 60
B. 70
C. 80
D. 90
Select your answer:
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What is a part of the circulatory system?
A. Heart, brain, muscle, skeleton
B. Heart, Veins, Arteries, Capillaries
C. Spine, Veins, Brain, Small Intestine
D. Bones, Muscle, Kidneys, Nerves