The heart structures that regulate heart action are: - sinoatrial node (SAN) - atrioventricular node (AVN) - Purkyne tissue Which row shows the correct pattern for atrial contraction and ventricular contraction?
- Aatrial contraction: AVN produces waves of excitation; ventricular contraction: SAN produces waves of excitation
- Batrial contraction: Purkyne tissue carries waves of excitation; ventricular contraction: AVN produces waves of excitation
- Catrial contraction: SAN and AVN produce waves of excitation; ventricular contraction: Purkyne tissue carries waves of excitation
- Datrial contraction: SAN produces waves of excitation; ventricular contraction: Purkyne tissue carries waves of excitation