The term 'Parts of Heads' can refer to the various components that make up the head, such as the ears, eyes, nose, and mouth. One of these parts is the ears, which are four-letter organs located on either side of the head that are responsible for hearing. They are composed of three parts: the outer ear, middle ear, and inner ear. The outer ear is the visible part of the ear, while the middle and inner ear contain the auditory ossicles and the cochlea, respectively.