part_of part of part of ectoderm-derived structure tooth enamel organ enamel organ A circumscribed mass of ectodermal cells which bud off from the dental lamina; it becomes cup-shaped and develops on its internal face the ameloblast layer of cells that produces the enamel cap of a developing tooth. odontogenic organ organum enameleum dental organ tooth bud structure with developmental contribution from neural crest cell cluster