Osteocyte = bone cell
(Haversian system)
the basic structural unit of compact bone; consists of central canal, lamellae (rings), lacunae, osteocytes and canaliculi
The osteon or haversian system /həˈvɜːr.ʒən/ (named for Clopton Havers) is the fundamental functional unit of much compact bone. Osteons are roughly cylindrical structures that are typically several millimeters long and around 0.2mm in diameter.