The term "auricle" refers to the outer part of the ear, also known as the pinna. It is the visible structure that helps capture sound waves and directs them into the ear canal. The auricle is made of cartilage and skin, and its unique shape aids in sound localization. In anatomy, "auricle" can also refer to a part of the heart, specifically the upper chambers called the atria. Each atrium has an auricle, which is a small, ear-like projection that helps increase the volume of the chamber. This structure plays a role in the heart's function by assisting in blood flow.