Below are several structures from the frog heart. Select the correct sequence that lists the structures from the one with the highest rate of contraction, to the one with the lowest rate of contraction.

Question

Quizplus · Accepted Answer

The sinus venosus has the highest rate of contraction as it initiates the heartbeat, followed by the atria which contract next, and finally the ventricle with the lowest rate of contraction as it receives the impulse last.

Below Are Several Structures from the Frog Heart