Optical Illusions

Our bodies are made up of millions and millions of different types of cells. I am a dog, and you are human, yet we have many of the same cells. We both have sensory receptor cells that sense things that are around us. Without these cells, we would bump into everything! As you can probably guess, most of these sensory receptor cells are near the surface of our bodies, in our eyes, ears, noses, tongues and even tails!