Question

Nina studies an artificial heart model. The model has tubes that supply an electric current to the model. Nina switches on the current that provides an impulse to the heart. She observes that the heart contracts and relaxes. Compare this model with that of a human heart, and place the steps describing how blood flows through the human heart in order.
♦signal transferred to the ventricles
♦the atria contract
♦electrical signal travels toward the heart
♦the ventricles contract
♦signal by the nodes in the atrium
♦signal received by the atrioventricular node

(btw this is a drag in drop need order)

Answer 1

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