The ears are organs that are used to hear things.

The ear lobes collect sound waves from the environment and direct them towards the ear. The sound waves travel through the auditory canal into the eardrum. The eardrum is a reverberating structure that enhances the volume of the sound waves. From there, the enhanced sound waves travel through the auditory ossicles into the cochlea of the inner ear. The receptor cells in the cochlea sense the sound waves, and the sensation is transmitted by auditory nerves into the auditory area of the brain's cerebral cortex. 

The receptor cells of the inner ear cannot regenerate. This is why it is important to protect your hearing from loud noises, for example when attending a concert.

The vestibular organs are also located in the inner ear. They give us information about the head's position and movement, even if we kept our eyes closed.