It makes sense to sniff out a good lesson on the sense of smell. Here is a six-slide presentation that can be a strong component to that lesson! With photographs and expository graphics, life scientists find that smell is the detection of actual chemicals! The roles played by the mucous membranes, receptor nerves, olfactory bulb, and the brain itself are explained. Where this lesson would be brief, it can be supplemented with other Study Jams! on the other four senses, all of which are accessible by links at the bottom of the webpage.