The auriculoventricular septum divides theauricles and ventriclesright and left auriclesright and left ventriclesright auricle and the left ventricle

The auriculoventricular septum, also known as the atrioventricular septum, is a crucial part of the heart's anatomy. It serves to separate the two upper chambers of the heart, known as the atria (auricles), from the two lower chambers, known as the ventricles. Specifically, the septum divides the right atrium from the right ventricle and the left atrium from the left ventricle.

1. Anatomical Divisions: The auriculoventricular septum creates a barrier between:

   • Right auricle (atrium) and right ventricle
   • Left auricle (atrium) and left ventricle

2. Functionality: This separation is essential for proper blood circulation. It ensures that oxygen-poor blood from the body enters the right atrium and flows into the right ventricle, which then pumps it to the lungs. Conversely, oxygen-rich blood from the lungs enters the left atrium, moves into the left ventricle, and is then pumped out to the body.

3. Significance: This division helps maintain the efficiency of the heart’s pumping action and prevents the mixing of oxygenated and deoxygenated blood.

In conclusion, the auriculoventricular septum specifically separates the right auricle from the right ventricle and the left auricle from the left ventricle, thereby playing a critical role in cardiac function and overall health.