Annulus fibrosus cordis
coronary sulcus
Atrio-ventricular valves
the difference between the ventricles and the atria is that the ventricles are thicker
There are no valves between the atria. The valves between the atria and ventricles close when the ventricles contract.
TRUE
the atria
When relaxed, the atria expand, and then the ventricles contract.
The atrioventricular node and the bundle of HIS are the electrical conduction link between the atria and the ventricles.
atrioventricular
atrioventricular
Yes, atria contracts before the ventricles.
The four chambers of the heart are the right and left atria, and the right and left ventricles. The atria are the upper chambers, and the ventricles the lower.