What is large auricles?

Large auricles refer to the external part of the ear, also known as the pinna, which is notably bigger than average. In anatomy, the term can also pertain to the atria of the heart, specifically the auricles that are the upper chambers receiving blood. Larger auricles in either context can affect function, such as sound collection in the case of the ear or blood flow and heart efficiency in the case of the heart. In some species, large auricles serve specific evolutionary purposes, such as enhanced hearing or thermoregulation.