What is the term for the upper chamber of the heart, also called an auricle?

The term for the upper chamber of the heart, referred to as an auricle, is "atrium." The heart consists of four chambers: two upper chambers called atria (singular: atrium) and two lower chambers known as ventricles. The atria receive blood returning to the heart from the body and lungs. The use of the term "auricle" is often associated with the atrium in relation to its ear-like shape.

In contrast, the other options refer to different structures or parts of the heart. The ventricles are the lower chambers responsible for pumping blood out of the heart, the septum is the wall that separates the left and right sides of the heart, and the aorta is the main artery that carries oxygenated blood from the heart to the rest of the body. Understanding these distinctions is crucial for a comprehensive grasp of cardiac anatomy and function.