compact bone tissue cortical bone tissue MP distinguishes compact/cortical bone. in other AOs they are syns The outer layers of solid, hard bone that covers spongy bone; consists of parallel osteons containing mineral deposits and interstitial lamellae. cortical region of bone MA:0001461 UMLS:C0222661 substantia corticalis FMA:24018 cortical bone compact bone tissue bony cortex galen:CorticalBone NCIT:C52714 compact bone uberon EMAPA:35250 substantia compacta (pars ossea) substantia compacta UBERON:0001439 skeletal tissue