Human Heart — Prelims Questions

Which of the following statements about the human heart is INCORRECT?

Which of the following structures is responsible for initiating the heartbeat and is known as the natural pacemaker of the heart?

Which of the following statements correctly describes the flow of blood through the human heart?

Which layer of the heart wall is primarily responsible for the pumping action?

Which of the following statements about the heart valves is correct?

Which of the following is a characteristic feature of cardiac muscle cells that allows for rapid and synchronized contraction?