The eye is the organ of sight, protected by eyebrows, eyelashes and eyelids. Light enters through the cornea and passes through the pupil and iris, then the crystalline lens focuses the image onto the retina. The retina then passes this visual information through the optic nerve to the brain. The ear is the organ of hearing and has three parts: the external ear picks up sounds, the middle ear transforms sounds into vibrations using the eardrum and three small bones, and the inner ear transforms these vibrations into nerve impulses sent to the brain via the auditory nerve. The tongue is the organ of taste, with taste receptors located in taste buds distributed across its surface according to the four basic