Ear and Eye Test study guide

The function of the human ear is to gather and transmit information about the .

Sound waves enter the . The outer ear acts like a funnel for the waves and moves them towards the . The waves strike the making vibrations in the . The is stimulated by the vibrations and the sends these vibrations to the and then to the . The membrane then sends the vibrations to the liquid filled . These vibrations are channeled into the . Once inside the cochlea, nerve cells pick up the vibrations into electrical impulses. These electrical impulses are sent to the where the recognizes the impulses as .

The function of the human eye is to .

The cornea the eye and light as it enters the eye. It also acts as a lens to help focus .

Light enters the eye through the . After passing through the cornea, light enters the . the then expands or contracts depending on the amount of light. the light passes through the depending on what you are focusing on, the Relax or contract. when did cornea and lens refract, an upside-down image is formed on the . The and cones help change the image on the retina into signals that travel to the along the short nerve called the The optic nerve combines the images from both of your eyes into a single three-dimensional image. your then interpret the signals as an upright image.