Olfactory epithelial cell culture, a kind of mini-organoid in vitro. This diagram was an outgrowth of doing some research on cultured olfactory epthelium with a woman in the department of anatomy. I was working on in vivo olfactory epithelium at the time, a rat model for inhalation toxicity and there was some collaboration among those interested in the sense of smell.  I did also a ton of electron microscopy on olfactory epithelial cell – organoids in culture and so I am quite confident that this old vector illustration represents a good “overview” of the cell types present (probably not in all) of the little lumps that were fixed for ultrastructural observation. IN fact I have a composite transmission electron micrographic montage of several of these structures which i should photograph (or rescan and reassemble) and post along with this.  I am pretty sure that this illustration was destined for a poster presentation. Legend for the cell types with the symbolic nuclei and colors to id which types of cells are present in this organoid. Sections were taken perpendicularly to the substrate, organoids were spherical, above the bottom layer of astrocyte type cells.