Dandelion is an herb. People use the above ground parts and root to make medicine. Dandelion is used for many conditions, but so far, there isnât enough scientific evidence to determine whether or not it is effective for any of them.
The olfactory epithelium is a layer of odor-sensitive cells located inside the depths of the nose. These cells react to odors as they enter the nose, sending signals to the olfactory bulb.
1 Chemical substances must be dissolved in water to excite the receptors for smell and taste.  The olfactory (smell) receptors are located in the superior aspect of each nasal cavity (Figure 8.7). Sniffing helps to bring more air (containing odors) over the olfactory mucosa.