The tissues listed below conduct an electrical impulse during the cardiac cycle. In which sequence does the electrical impulse pass through the cardiac cycle?
- A$1 \rightarrow 2 \rightarrow 3 \rightarrow 4$
- B$1 \rightarrow 4 \rightarrow 2 \rightarrow 3$
- C$4 \rightarrow 2 \rightarrow 1 \rightarrow 3$
- D$4 \rightarrow 2 \rightarrow 3 \rightarrow 1$