The external part of the ear is composed of two parts: the PINNA and the AURICLE. The PINNA, also known as the auricula or auricular appendage, is the visible outer portion of the ear and is composed of cartilage and skin. The AURICLE, also known as the PINNA, is the fleshy, curved outer portion of the ear and is composed of elastic cartilage covered with skin. Both the PINNA and the AURICLE are important for hearing, as they help to funnel sound waves into the ear canal.