1. Light enters through the pupil, and reaches the lens, which focuses light on the retina. The retina contains light sensitive cells called cones and rods. The cones and rods change light energy into electrical impulses which travel through the optic nerve to the brain. Cones require more light and are color-sensitive. Rods require less light and are not color-sensitive. Sight

3. Visual Pathway Stimuli from right field of vision travels to left side of brain, and vice versa.

4. Color Deficiency (aka color blind) - when cones do not function properly. Binocular Fusion - the process of combining the images received from the two eyes into a single, fused image. Retinal Disparity - the difference between the images stimulating each eye. Sight

9. Hearing

10. Smell and Taste

11. Touch Receptors in skin provide brain with four major pieces of information: Pressure Cold Heat Pain

12. Other Senses Balance Kinesthesis - body knowledge Pain