part of olfactory bulb development anatomical structure development olfactory bulb mitral cell layer development dph The progression of the olfactory bulb mitral cell layer over time from its initial formation until its mature state. The mitral cell layer is composed of pyramidal neurons whose cell bodies are located between the granule cell layer and the plexiform layer. biological_process 2010-02-09T03:30:23Z GO:0061034